December Birthstone – Turquoise

previous month zodiac signs next month Turquoise fact file Crystal Structure: minute triclinic crystals Chemical Composition: hydrous phosphate of aluminum and copper CuO.3Al2O3.2P2O5.9H2O Hardness: 5-6 MOHS Refractive Index: 1.61 to 1.65 Colors: Opaque, dark to light blue, different ranges of…

November Birthstone – Topaz

previous month zodiac signs next month Topaz fact file Crystal Structure:orthorhombicChemical Composition:fluosilicate of aluminum Hardness:5-6 MOHSRefractive Index:colorless and blue topaz – 1.610 to 1.617yellow and brown topaz – 1.630 to 1.637Colors:Many colors including pink, blue, lavender, yellow, orange, orange-yellow, brownish…

October Birthstone – Opal

previous month zodiac signs next month Opal fact file Crystal Structure:octahedron Chemical Composition: Quartz – Silicon dioxide, SiO2 Hardness: 5 ½ to 6 ½ MOHSRefractive Index: 1.43-1.46Colors: Body color – white or tan or bluish.Play colors – red, orange, yellow,…

August Birthstone – Peridot

previous month zodiac signs next month Peridot fact file Crystal Structure: Orthorhombic Chemical Composition: Chrysolite or Olivene – Magnesium/Iron Silicate ( (Mg,Fe)2SiO4 ) Hardness: 6 ½ to 7 MOHSRefractive Index: 1.654 to 1.690 Colors: Transparent yellowish-green, bottle green Peridot, the…

July Birthstone – Ruby

previous month zodiac signs next month Ruby fact file Crystal Structure: hexagonal Chemical Composition: corundum – aluminum oxide (Al2O3) Hardness: 9 MOHSRefractive Index: 1.762 to 1.77 Colors: shades of red, orange- red, or purple red Ruby is the July birthstone.…