Gemstones

Characteristics of Amblygonite

Characteristics of Amblygonite: Chemical Name: Lithium, sodium alumino- phosphate Formula: Colors: White, yellow, lilac Structure: Triclinic Hardness: 5.5-6 Specific Gravity: 3.0-3.1 Refractive Index: 1.57-1.64 Lustre: Vitreous to greasy or pearly...

Characteristics of Brazilianite

Characteristics of Brazilianite: Chemical Name: Sodium aluminum phosphate Formula: Colors: Yellow, green Structure: Monoclinic Hardness: 5.5 Specific Gravity: 3.0 Refractive Index: 1.60-1.62 Lustre: Vitreous Streak: Colorless Locations: Brazil, USA  ...

Characteristics of Turquoise

Characteristics of Turquoise: Chemical Name: Copper aluminum phosphate Formula: Colors: Blue, green Structure: Triclinic Hardness: 5-6 Specific Gravity: 2.4-2.9 Refractive Index: 1.61-1.65 Lustre: Waxy Streak: White-green Locations: Iran, China, USA,...

Characteristics of Malachite

Characteristics of Malachite: Chemical Name: Copper carbonate Formula: Cu3(CO3)2(OH)2 Colors: Bright green Structure: Monoclinic Hardness: 3.5-4 Specific Gravity: 3.2-4.1 Refractive Index: 1.65-1.91 Lustre: Adamantine to silky Streak: Pale green Locations:...

Characteristics of Azurite

Characteristics of Azurite: Chemical Name: Copper carbonate Formula: Cu3(CO3)2(OH)2 Colors: Azure to dark blue Structure: Monoclinic Hardness: 3.5-4 Specific Gravity: 3.7-3.9 Refractive Index: 1.71-1.85 Lustre: Vitreous to dull earthy Streak:...

Characteristics of Smithsonite

Characteristics of Smithsonite: Chemical Name: Zinc carbonate Formula: ZnCO3 Colors: White, blue, green, yellow, pink, lilac, colorless Structure: Hexagonal, trigonal Hardness: 4-4.5 Specific Gravity: 4.3-4.5 Refractive Index: 1.62-1.85 Lustre: Vitreous...