Gemstones

Characteristics of Pectolite

Characteristics of Pectolite: Chemical Name: Sodium calcium silicate Formula: NaCa2Si3O8(OH) Colors: Colorless, white, bluish, greenish Structure: Triclinic Hardness: 4.5-5 Specific Gravity: 2.8-2.9 Refractive Index: 1.59-1.64 Lustre: Vitreous to silky Streak:...

Characteristics of Rhodonite

Characteristics of Rhodonite: Chemical Name: Manganese calcium silicate Formula: (Mn, Fe, Mg, Ca)SiO3 Colors: Pink to rose-red Structure: Triclinic Hardness: 5.5-6.5 Specific Gravity: 3.4-3.7 Refractive Index: 1.72-1.76 Lustre: Vitreous Streak:...

Characteristics of Jade (Nephrite and Jadeite)

Characteristics of Nephrite: Chemical Name: Calcium, magnesium silicate hydroxide Formula:  Ca₂(Mg, Fe)₅Si₈O₂₂(OH)₂ Colors: White, grey, green, lavender, pink Structure: Monoclinic Hardness: 6.5 Specific Gravity: 2.9-3.4 Refractive Index: 1.61-1.63 Lustre: Dull...

Characteristics of Kunzite

Characteristics of Kunzite: Chemical Name: Lithium aluminum silicate Formula: LiAl(SiO3)2 Colors: Pink Structure: Monoclinic Hardness: 6.5-7 Specific Gravity: 3.0-3.2 Refractive Index: 1.66-1.68 Lustre: Vitreous Streak: White Locations: Afghanistan, USA, Brazil,...

Characteristics of Hiddenite

Characteristics of Hiddenite: Chemical Name: Lithium aluminum silicate Formula: LiAl(SiO3)2 Colors: Green, green-blue, yellow-green Structure: Monoclinic Hardness: 6.5-7 Specific Gravity: 3.0-3.2 Refractive Index: 1.66-1.68 Lustre: Vitreous Streak: Colorless Locations: USA,...

Characteristics of Bronzite

Characteristics of Bronzite: Chemical Name: Iron, magnesium silicate Formula: (Mg,Fe++)2Si2O6 Colors: Green, brown, bronze Structure: Orthorhombic Hardness: 5.5 Specific Gravity: 3.35 Refractive Index: 1.65-1.67 Lustre: Vitreous Streak: White to grey...