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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (4868): 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: 4163381 pcs
0.84ct Tourmaline
10.38mm x 3.12mm x 2.68mm
USD 20.16
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ID: 3781271 pcs
0.99ct Tourmaline
6.14mm x 4.11mm
USD 47.86
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ID: 3652521 pcs
10.04ct Boulder Opal
15.22mm x 12.06mm x 6.30mm
USD 70.28
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ID: 3483971 pcs
2.55ct Tourmaline
22.37mm x 3.75mm x 2.99mm
USD 63.75
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ID: 3697941 pcs
2.61ct Fire Opal
11.16mm x 9.17mm x 5.72mm
USD 84.64
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ID: 4136531 pcs
1.52ct Tourmaline
6.95mm x 5.56mm x 4.16mm
USD 68.40
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ID: 4321522 pcs
1.31ctw Fire Opal
8.03mm x 6.13mm x 3.30mm
USD 34.83
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ID: 4055291 pcs
1.49ct Fire Opal
10.20mm x 7.98mm x 4.69mm
USD 35.25
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ID: 4291041 pcs
0.92ct Opal
8.04mm x 6.04mm x 3.88mm
USD 25.76
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ID: 4137811 pcs
2.85ct Tourmaline
11.59mm x 6.08mm x 4.17mm
USD 114.00
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ID: 3467131 pcs
1.84ct Tourmaline
21.72mm x 3.48mm x 2.25mm
USD 40.48
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ID: 3838031 pcs
1.59ct Tourmaline
12.28mm x 3.89mm x 3.33mm
USD 30.37
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ID: 3469001 pcs
1.54ct Tourmaline
14.69mm x 3.56mm x 2.85mm
USD 33.88
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ID: 4196101 pcs
1.94ct Tourmaline
8.67mm x 6.66mm x 4.87mm
USD 291.00
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ID: 4133321 pcs
1.83ct Tourmaline
8.24mm x 6.65mm x 5.03mm
USD 57.92
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ID: 2569844 pcs
3.42ctw Tourmaline
6.60mm x 5.09mm x 3.69mm
USD 67.50
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ID: 3788014 pcs
1.81ctw Tourmaline
5.99mm x 4.12mm x 2.88mm
USD 82.36
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ID: 4215261 pcs
1.20ct Tourmaline
7.32mm x 6.01mm x 4.00mm
USD 60.00
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ID: 4160341 pcs
3.19ct Tourmaline
28.41mm x 3.57mm x 3.04mm
USD 95.70
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ID: 4293091 pcs
0.71ct Opal
8.14mm x 6.06mm x 3.39mm
USD 19.88
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ID: 4207801 pcs
10.63ct Boulder Opal
16.63mm x 12.34mm x 6.04mm
USD 63.78
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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