TOURMALINE
(Indicolite) 12.7 CARATS
Hardness: 7 – 7 ½ IR : 1.62 – 1.65 Birefringence: 0.014 – 0.021 Density: 3.0 – 3.1 < Stability: Very good Origin: XXX
AMETHYST
7.4 CARATS
Hardness: 7 IR : 1.54 – 1.56 Birefringence: 0.009 Density: 2.65 Stability: Good Origin : Bolivia
WELO OPAL
4.3 CARATS
Hardness: 6 IR : 1.40 – 1.46 Birefringence: none Density: 2.00 – 2.10 Stability: Medium Origin : Ethiopia
IMPERIAL TOPAZ
2.7 CARATS
Hardness: 8 IR : 1.61 – 1.64 Birefringence: 0.008 – 0.010 Density: 3.5 – 3.6 Stability: Good Origin: Brazil
EMERALD
2.6 CARATS
Hardness: 7 ½ IR : 1.57 – 1.60 Birefringence: 0.006 – 0.008 Density: 2.65 – 2.80 Stability: Medium Origin : Zambia
SPINEL
4.1 CARATS
Hardness: 8 IR : 1.72 – 1.73 Birefringence: None Density: 3.61 – 3.67 Stability: Very good Origin: Tanzania
DIAMOND
1.4 CARATS
Hardness: 10 IR : 2.42 Birefringence: none Density: 3.52 Stability: Excellent Color D, Purity VVS1
Aigue-marine
7.2 CARATS
Hardness: 7 ½ IR : 1.56 – 1.60 Birefringence: 0.003 – 0.010 Density: 2.65 – 2.80 Stability: Good Origin : Madagascar
TANZANITE
5.5 CARATS
Hardness: 6½ IR : 1.69 – 1.70 Birefringence: 0.006 – 0.013 Density: 3.15 – 3.38 Stability: Good Origin: Tanzania
GARNET
5.2 CARATS
Hardness: 6½ – 7 ½ IR : 1.70 – 1.89 Birefringence: none Density: 3.30 – 4.20 Stability: Good Origin: Malawi
RUBIN
2.1 CARATS
Hardness: 9 IR : 1.76 – 1.78 Birefringence: 0.008 – 0.009 Density: 3.80 – 4.05 Stability: Very good Origin : Mozambique
SAPPHIRE
3.5 CARATS
Hardness: 9 IR : 1.76 – 1.78 Birefringence: 0.008 – 0.009 Density: 3.80 – 4.05 Stability: Very good Origin: Sri Lanka
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