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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (4533): October Birthstones Tourmaline, Fire Opal, Moss Opal, Opal, Opal Doublet, Cat's Eye Tourmaline, Paraiba Tourmaline, Chrome Tourmaline, Rubellite Tourmaline, Boulder Opal, Chocolate Opal, Black Opal Clear All
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ID: 3080701 pcs
1.50ct Opal
11.30 x 7.44 x 5.11mm
USD 64.50
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ID: 4159761 pcs
1.55ct Tourmaline
20.42 x 3.04 x 2.33mm
USD 37.20
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ID: 3439271 pcs
0.87ct Opal
9.99 x 6.53 x 4.08mm
USD 34.80
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ID: 4257511 pcs
0.55ct Tourmaline
5.00 x 4.96 x 2.88mm
USD 10.54
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ID: 4292571 pcs
0.79ct Opal
7.90 x 6.21 x 3.40mm
USD 22.12
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ID: 3836351 pcs
1.84ct Tourmaline
16.60 x 3.68 x 2.91mm
USD 35.14
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ID: 4161241 pcs
0.74ct Tourmaline
14.46 x 2.51 x 2.04mm
USD 17.76
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ID: 4140701 pcs
1.86ct Tourmaline
6.46 x 5.68 x 5.83mm
USD 45.44
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ID: 3483021 pcs
2.15ct Tourmaline
21.35 x 3.75 x 2.63mm
USD 53.75
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ID: 3774281 pcs
1.30ct Chrome Tourmaline
5.86 x 7.59 x 4.29mm
USD 166.56
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ID: 3502731 pcs
1.73ct Tourmaline
17.03 x 3.69 x 2.68mm
USD 38.06
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ID: 4293011 pcs
0.73ct Opal
7.97 x 6.01 x 3.54mm
USD 20.44
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ID: 4018844 pcs
2.15ctw Tourmaline
6.24 x 4.51 x 2.91mm
USD 80.41
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ID: 3496001 pcs
1.62ct Tourmaline
17.71 x 3.30 x 2.73mm
USD 48.60
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ID: 4377661 pcs
1.54ct Tourmaline
16.24 x 3.73 x 2.58mm
USD 38.50
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ID: 3791491 pcs
1.00ct Tourmaline
7.96 x 5.98 x 3.34mm
USD 48.00
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ID: 3118541 pcs
1.64ct Opal
10.16 x 8.01 x 5.02mm
USD 65.60
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ID: 3621591 pcs
18.10ct Tourmaline
20.04 x 12.16 x 8.78mm
USD 68.42
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ID: 3787011 pcs
1.67ct Tourmaline
10.02 x 4.95 x 3.77mm
USD 75.98
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ID: 4137821 pcs
2.13ct Tourmaline
11.32 x 4.80 x 3.96mm
USD 85.20
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ID: 4159801 pcs
1.57ct Tourmaline
23.35 x 2.77 x 2.25mm
USD 37.68
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October Birthstones
Opal and tourmaline are the birthstones for October, providing choices in every possible color. More than any other gem, each opal is distinctly an individual. No other stone has as rich and varied a folklore. Opals are also the most delicate gems commonly worn. They require special care to ensure their health and longevity.

Tourmaline derives from the Sinhalese term "turamali", which translates as "stone of mixed colors". The very name refers to the unique spectrum of colors displayed by this gemstone, which is second to none in the realm of precious stones. One of the most versatile of gemstones, tourmaline is available in every color, from colorless to black. It can show every tone from pastel to dark, and can exhibit various colors in the same stone.

The astrological stone for Scorpio is beryl. Beryl is one of the most important mineral groups and also one of the biggest gemstone groups. Although the mineral is abundant, it rarely occurs in transparent gem-quality material. Transparent gem-quality beryl is referred to as 'precious beryl'. The most famous beryl gemstone is green emerald, followed by blue aquamarine. Golden beryl is not very well-known by the general public. Other popular beryl gems include pink 'morganite' and white, or colorless, 'goshenite'. Red beryl is the rarest variety of beryl and it is known in the trade as 'bixbite'.
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart