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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (4682): 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: 4164841 pcs
4.47ct Tourmaline
14.55mm x 7.69mm x 4.49mm
USD 849.30
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ID: 4132721 pcs
1.14ct Tourmaline
7.31mm x 6.04mm x 3.74mm
USD 36.08
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ID: 3291324 pcs
2.31ctw Black Opal
6.95mm x 4.99mm x 3.33mm
USD 92.40
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ID: 3701041 pcs
1.66ct Tourmaline
21.59mm x 3.09mm x 2.52mm
USD 32.34
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ID: 3118351 pcs
1.86ct Opal
11.13mm x 8.21mm x 5.16mm
USD 74.40
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ID: 4133171 pcs
1.03ct Tourmaline
8.30mm x 5.66mm x 3.22mm
USD 32.60
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ID: 4132411 pcs
1.60ct Tourmaline
7.44mm x 6.76mm x 4.53mm
USD 50.64
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ID: 2698361 pcs
1.30ct Opal
9.46mm x 6.26mm x 4.82mm
USD 20.10
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ID: 4345524 pcs
3.03ctw Tourmaline
5.65mm x 4.92mm x 4.13mm
USD 95.96
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ID: 3837501 pcs
1.38ct Tourmaline
17.19mm x 2.94mm x 2.63mm
USD 26.36
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ID: 3543591 pcs
5.89ct Tourmaline
12.55mm x 9.87mm x 6.78mm
USD 41.23
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ID: 3790772 pcs
1.41ctw Tourmaline
7.05mm x 5.06mm x 3.16mm
USD 63.97
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ID: 4133261 pcs
1.41ct Tourmaline
8.61mm x 6.90mm x 3.73mm
USD 44.63
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ID: 3430851 pcs
1.31ct Opal
11.43mm x 7.50mm x 4.22mm
USD 58.95
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ID: 3791501 pcs
1.12ct Tourmaline
7.94mm x 5.88mm x 3.90mm
USD 53.76
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ID: 3833481 pcs
1.45ct Tourmaline
16.01mm x 3.23mm x 2.76mm
USD 27.81
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ID: 3842031 pcs
1.34ct Tourmaline
17.70mm x 3.12mm x 2.44mm
USD 25.86
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ID: 3788447 pcs
2.39ctw Tourmaline
5.96mm x 3.05mm x 2.17mm
USD 108.74
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ID: 3788721 pcs
0.83ct Tourmaline
7.11mm x 5.21mm x 3.46mm
USD 37.76
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ID: 3651781 pcs
1.72ct Tourmaline
14.94mm x 3.60mm x 3.21mm
USD 34.31
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ID: 3219281 pcs
45.15ct Boulder Opal
33.43mm x 19.84mm x 7.85mm
USD 316.05
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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