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Buy Corundum Gemstones

(661)
Corundum Gemstones Weight Corundum Gemstones Size Corundum Gemstones Clarity Corundum Gemstones Price Corundum Gemstones Origin
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0.73 ct Loose Orange Sapphire, 4.5 x 4.5 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 0.73 carat weight Sapphire

0.73ct1 Piece
$ 39.82
4.5 x 4.5 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.73 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.5 x 4.5 mm Sapphire
Sapphire Color: Honey Orange Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.50ct1 Piece
$ 1,005.03
6.8 x 6.5 mm
Item Description
Stone Type: Loose Ruby
Ruby Weight: 1.50 ct Ruby
Ruby Shape: Cushion-Cut Ruby
Ruby Size: 6.8 x 6.5 mm Ruby
Ruby Color: Deep Red Ruby
Ruby Clarity: VS-SI Ruby
Ruby Origin: Myanmar Ruby
Ruby Treatment: Heated
Ruby Quantity: 1
Ruby Certificate: GemSelect
Product Description:
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1.04 ct Loose Violet Sapphire, 6.7 x 5.1 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.04 carat weight Sapphire

1.04ct1 Piece
$ 500.59
6.7 x 5.1 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.04 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.7 x 5.1 mm Sapphire
Sapphire Color: Royal Violet Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Untreated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.38ct1 Piece
$ 124.20
5.7 x 5.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.38 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 5.7 x 5.3 mm Sapphire
Sapphire Color: Multicolor Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.60ct1 Piece
$ 96.00
4.4 x 4.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.60 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.4 x 4.3 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VVS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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2.02ct1 Piece
$ 9,045.32
7.2 x 6.8 mm
Item Description
Stone Type: Loose Ruby
Ruby Weight: 2.02 ct Ruby
Ruby Shape: Cushion-Cut Ruby
Ruby Size: 7.2 x 6.8 mm Ruby
Ruby Color: Pinkish Red Ruby
Ruby Clarity: SI Ruby
Ruby Origin: Mozambique Ruby
Ruby Treatment: Untreated
Ruby Quantity: 1
Ruby Certificate: GemSelect
Product Description:
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1.09 ct Loose Violet Sapphire, 6.7 x 4.7 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.09 carat weight Sapphire

1.09ct1 Piece
$ 359.70
6.7 x 4.7 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.09 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.7 x 4.7 mm Sapphire
Sapphire Color: Pinkish Violet Sapphire
Sapphire Clarity: VVS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.89 ct Loose Multicolor Sapphire, 6.4 x 4.5 mm Cushion Cut From Madagascar

Natural Sapphire, Qty: 1 pc | 0.89 carat weight Sapphire

0.89ct1 Piece
$ 142.40
6.4 x 4.5 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.89 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.4 x 4.5 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VVS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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7.12ct1 Piece
$ 356.00
10.2 x 9.9 mm
Item Description
Stone Type: Loose Ruby
Ruby Weight: 7.12 ct Ruby
Ruby Shape: Cushion-Cut Ruby
Ruby Size: 10.2 x 9.9 mm Ruby
Ruby Color: Dark Red Ruby
Ruby Clarity: VS Ruby
Ruby Origin: Madagascar Ruby
Ruby Treatment: Fracture Filled
Ruby Quantity: 1
Ruby Certificate: GemSelect
Product Description:
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1.59 ct Loose Purple Sapphire, 7.8 x 5.3 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.59 carat weight Sapphire

1.59ct1 Piece
$ 841.86
7.8 x 5.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.59 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 7.8 x 5.3 mm Sapphire
Sapphire Color: Medium Purple Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Untreated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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7.67ct1 Piece
$ 383.50
10.3 x 10.1 mm
Item Description
Stone Type: Loose Ruby
Ruby Weight: 7.67 ct Ruby
Ruby Shape: Cushion-Cut Ruby
Ruby Size: 10.3 x 10.1 mm Ruby
Ruby Color: Dark Red Ruby
Ruby Clarity: VS Ruby
Ruby Origin: Madagascar Ruby
Ruby Treatment: Fracture Filled
Ruby Quantity: 1
Ruby Certificate: GemSelect
Product Description:
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0.59ct1 Piece
$ 94.40
4.4 x 4.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.59 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.4 x 4.3 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.54 ct Loose Purple Sapphire, 6.8 x 5.4 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.54 carat weight Sapphire

1.54ct1 Piece
$ 815.39
6.8 x 5.4 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.54 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.8 x 5.4 mm Sapphire
Sapphire Color: Medium Purple Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Untreated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.34 ct Loose Purple Sapphire, 7.1 x 5.3 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.34 carat weight Sapphire

1.34ct1 Piece
$ 709.50
7.1 x 5.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.34 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 7.1 x 5.3 mm Sapphire
Sapphire Color: Electric Purple Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Untreated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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29.52ct1 Piece
$ 1,328.40
16 x 15.8 mm
Item Description
Stone Type: Loose Ruby
Ruby Weight: 29.52 ct Ruby
Ruby Shape: Cushion-Cut Ruby
Ruby Size: 16 x 15.8 mm Ruby
Ruby Color: Medium Red Ruby
Ruby Clarity: VS Ruby
Ruby Origin: Madagascar Ruby
Ruby Treatment: Fracture Filled
Ruby Quantity: 1
Ruby Certificate: GemSelect
Product Description:
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24.06ct1 Piece
$ 1,203.00
15.2 x 14.9 mm
Item Description
Stone Type: Loose Ruby
Ruby Weight: 24.06 ct Ruby
Ruby Shape: Cushion-Cut Ruby
Ruby Size: 15.2 x 14.9 mm Ruby
Ruby Color: Dark Red Ruby
Ruby Clarity: VS Ruby
Ruby Origin: Madagascar Ruby
Ruby Treatment: Fracture Filled
Ruby Quantity: 1
Ruby Certificate: GemSelect
Product Description:
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1.11ct1 Piece
$ 88.80
5.7 x 5.6 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.11 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 5.7 x 5.6 mm Sapphire
Sapphire Color: Yellowish Green Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.34 ct Loose Multicolor Sapphire, 6.6 x 5.3 mm Cushion Cut From Madagascar

Natural Sapphire, Qty: 1 pc | 1.34 carat weight Sapphire

1.34ct1 Piece
$ 214.40
6.6 x 5.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.34 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.6 x 5.3 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.11 ct Loose Violet Sapphire, 6.5 x 4.7 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.11 carat weight Sapphire

1.11ct1 Piece
$ 366.30
6.5 x 4.7 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.11 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.5 x 4.7 mm Sapphire
Sapphire Color: Medium Light Violet Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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9.04 ct Cushion Ruby-Zoisite, 15.5 x 9.9 mm From Tanzania

Natural Ruby-Zoisite, Qty: 1 pc | 9.04 carat weight Ruby-Zoisite

9.04ct1 Piece
$ 22.06
15.5 x 9.9 mm
Item Description
Stone Type: Loose Ruby-Zoisite
Ruby-Zoisite Weight: 9.04 ct Ruby-Zoisite
Ruby-Zoisite Shape: Cushion Cabochon Ruby-Zoisite
Ruby-Zoisite Size: 15.5 x 9.9 mm Ruby-Zoisite
Ruby-Zoisite Color: Multicolor Ruby-Zoisite
Ruby-Zoisite Clarity: Opaque Ruby-Zoisite
Ruby-Zoisite Origin: Tanzania Ruby-Zoisite
Ruby-Zoisite Treatment: Untreated
Ruby-Zoisite Quantity: 1
Ruby-Zoisite Certificate: GemSelect
Product Description:
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0.6 ct Loose Orange Sapphire, 4.6 x 4.5 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 0.60 carat weight Sapphire

0.60ct1 Piece
$ 32.73
4.6 x 4.5 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.60 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.6 x 4.5 mm Sapphire
Sapphire Color: Bright Red Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.97ct1 Piece
$ 155.20
5.3 x 5.2 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.97 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 5.3 x 5.2 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.57 ct Loose Orange Sapphire, 4.4 x 4.4 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 0.57 carat weight Sapphire

0.57ct1 Piece
$ 31.09
4.4 x 4.4 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.57 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.4 x 4.4 mm Sapphire
Sapphire Color: Reddish Orange Sapphire
Sapphire Clarity: VVS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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3.91 ct Black Star Sapphire, 9.4 x 8.4 mm Cushion Cut From Thailand

Natural Star Sapphire, Qty: 1 pc | 3.91 carat weight Star Sapphire

3.91ct1 Piece
$ 70.38
9.4 x 8.4 mm
Item Description
Stone Type: Loose Star Sapphire
Star Sapphire Weight: 3.91 ct Star Sapphire
Star Sapphire Shape: Cushion Cabochon Star Sapphire
Star Sapphire Size: 9.4 x 8.4 mm Star Sapphire
Star Sapphire Color: Black Star Sapphire
Star Sapphire Clarity: Opaque Star Sapphire
Star Sapphire Origin: Thailand Star Sapphire
Star Sapphire Treatment: Heated
Star Sapphire Quantity: 1
Star Sapphire Certificate: GemSelect
Product Description:
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0.60ct1 Piece
$ 96.00
5.4 x 4.2 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.60 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 5.4 x 4.2 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.59ct1 Piece
$ 32.18
4.3 x 4.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.59 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.3 x 4.3 mm Sapphire
Sapphire Color: Light Mint Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.60ct1 Piece
$ 96.00
4.5 x 4.5 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.60 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.5 x 4.5 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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5 ct Loose Orange Sapphire, 9.8 x 8.9 mm Cushion Cut From Thailand

Natural Sapphire, Qty: 1 pc | 5.00 carat weight Sapphire

5.00ct1 Piece
$ 2,844.16
9.8 x 8.9 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 5.00 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 9.8 x 8.9 mm Sapphire
Sapphire Color: Medium-Light Orange Sapphire
Sapphire Clarity: VS-SI Sapphire
Sapphire Origin: Thailand Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.41 ct Loose Purple Sapphire, 7.1 x 4.6 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.41 carat weight Sapphire

1.41ct1 Piece
$ 747.58
7.1 x 4.6 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.41 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 7.1 x 4.6 mm Sapphire
Sapphire Color: Medium-Dark Purple Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Untreated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.95ct1 Piece
$ 76.00
6.1 x 4.6 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.95 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.1 x 4.6 mm Sapphire
Sapphire Color: Greenish Blue Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.6 ct Loose Yellow Sapphire, 4.4 x 4.4 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 0.60 carat weight Sapphire

0.60ct1 Piece
$ 32.73
4.4 x 4.4 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.60 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.4 x 4.4 mm Sapphire
Sapphire Color: Golden-Orange Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.43ct1 Piece
$ 23.46
4.2 x 4.2 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.43 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 4.2 x 4.2 mm Sapphire
Sapphire Color: Very Light Sage Green Sapphire
Sapphire Clarity: VVS-VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.06ct1 Piece
$ 190.80
5.6 x 5.6 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.06 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 5.6 x 5.6 mm Sapphire
Sapphire Color: Teal Sapphire
Sapphire Clarity: VVS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1.34 ct Loose Purple Sapphire, 6.5 x 5.3 mm Cushion Cut From Tanzania

Natural Sapphire, Qty: 1 pc | 1.34 carat weight Sapphire

1.34ct1 Piece
$ 645.00
6.5 x 5.3 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 1.34 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 6.5 x 5.3 mm Sapphire
Sapphire Color: Intense Pinkish Purple Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Tanzania Sapphire
Sapphire Treatment: Untreated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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0.94ct1 Piece
$ 75.20
5.9 x 4.1 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 0.94 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 5.9 x 4.1 mm Sapphire
Sapphire Color: Multicolor Sapphire
Sapphire Clarity: VS Sapphire
Sapphire Origin: Madagascar Sapphire
Sapphire Treatment: Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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3.25 ct Loose Yellow Sapphire, 8.5 x 8.1 mm Cushion Cut From Thailand

Natural Sapphire, Qty: 1 pc | 3.25 carat weight Sapphire

3.25ct1 Piece
$ 1,848.70
8.5 x 8.1 mm
Item Description
Stone Type: Loose Sapphire
Sapphire Weight: 3.25 ct Sapphire
Sapphire Shape: Cushion-Cut Sapphire
Sapphire Size: 8.5 x 8.1 mm Sapphire
Sapphire Color: Dark Golden Sapphire
Sapphire Clarity: VS-SI Sapphire
Sapphire Origin: Thailand Sapphire
Sapphire Treatment: Be Heated
Sapphire Quantity: 1
Sapphire Certificate: GemSelect
Product Description:
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1 2 3
1 - 19
Corundum itself is not a very rare mineral, but transparent gem-quality corundum is extremely rare. Most corundum is opaque to translucent and heavily included, suitable only for industrial use, including the production of abrasives used for sandpaper and machining of metal, plastics and wood, and as of recently, has become very important in the making of mobile phone components. The name 'corundum' comes from the Sanskrit word 'kuruvindam', meaning "ruby sapphire", which are the two distinct members of the corundum family.

Ruby is red corundum, while all other colors are referred to as sapphire. Blue sapphire and red ruby make up 2 of the 'four precious gems', which also includes green emerald and diamond. While there is no definitive distinction between red ruby and sapphire; in many cases, a near-red sapphire may be classed as an inferior color grade ruby. Thus, it is usually more common of practice to trade near-red sapphires as 'high-grade' fancy sapphire, rather than as 'low-grade' ruby. The corundum family includes variations of ruby and sapphire, including color change sapphire, star sapphire and star ruby. Ruby is also found in mixed gems such as ruby-zoisite and ruby-in-fuchsite.

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