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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (4539): 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: 2719861 pcs
4.14ct Opal
14.76 x 9.84 x 7.44mm
USD 74.00
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ID: 35334910 pcs
4.37ctw Tourmaline
5.16 x 3.56mm
USD 69.92
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ID: 3460001 pcs
0.78ct Opal
8.22 x 6.18 x 4.43mm
USD 31.20
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ID: 3838361 pcs
1.77ct Tourmaline
22.11 x 3.33 x 2.38mm
USD 33.81
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ID: 3650351 pcs
9.73ct Tourmaline
17.88 x 8.56 x 7.08mm
USD 37.75
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ID: 4163671 pcs
1.25ct Tourmaline
16.50 x 2.92 x 2.53mm
USD 30.00
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ID: 4203381 pcs
0.85ct Tourmaline
6.16 x 5.46 x 3.22mm
USD 29.75
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ID: 3507121 pcs
1.36ct Tourmaline
14.49 x 3.76 x 2.44mm
USD 29.92
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ID: 35334710 pcs
6.53ctw Tourmaline
6.06 x 3.89mm
USD 104.48
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ID: 3243941 pcs
2.18ct Black Opal
13.15 x 9.07 x 4.42mm
USD 87.20
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ID: 3153301 pcs
1.75ct Opal
10.58 x 8.39 x 5.79mm
USD 73.50
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ID: 4294981 pcs
0.85ct Opal
7.98 x 6.09 x 3.89mm
USD 23.80
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ID: 4287952 pcs
1.68ctw Opal
8.10 x 6.01 x 4.05mm
USD 47.04
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ID: 3297995 pcs
2.67ctw Black Opal
6.98 x 4.95 x 3.19mm
USD 106.80
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ID: 3175901 pcs
4.27ct Black Opal
15.29 x 9.53 x 5.11mm
USD 170.80
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ID: 4055301 pcs
1.67ct Fire Opal
10.79 x 8.48 x 4.78mm
USD 39.51
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ID: 3671442 pcs
3.15ctw Fire Opal
8.85 x 7.18 x 5.16mm
USD 105.05
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ID: 3481322 pcs
1.66ctw Tourmaline
12.93 x 2.96 x 2.23mm
USD 36.52
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ID: 4019463 pcs
1.66ctw Tourmaline
6.90 x 4.74 x 2.92mm
USD 62.08
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ID: 4200151 pcs
0.82ct Tourmaline
7.25 x 5.42 x 3.03mm
USD 31.16
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ID: 4322431 pcs
0.74ct Fire Opal
8.02 x 6.10 x 3.88mm
USD 19.68
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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