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,…
previous month zodiac signs next month Sapphire fact file Crystal Structure: hexagonal Chemical Composition: Corundum ( Aluminum oxide- Al203 ) Hardness: 9 MOHS Refractive Index: 1.762 to 1.77 Colors: yellow, green, pink, clear, and blue Sapphire, the symbol of truth,…
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…
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.…
previous month zodiac signs next month Pearl fact file Crystal Structure: orthorhombic Chemical Composition: Aragonite ( calcium carbonate ) platelets held together by conchiolin Hardness: 2.4 – 4.5 MOHs Refractive Index: 1.53-1.69 Colors: white with pink tones, tan, yellow, brown,…
previous month zodiac signs next month Emerald fact file Crystal Structure: hexagonal Chemical Composition: Beryl – silicate of Beryllium and Aluminum Al2Be3(Si6O18) Hardness: 7.5 to 8 MOHS Refractive Index: 1.57 to 1.60 Colors: light to dark green Emerald, the green…
previous month zodiac signs next month Diamond fact file Crystal Structure: isometric Chemical Composition: Carbon Hardness: 10 MOHS Refractive Index: 2.417 Colors: colorless, yellow, black, red, green, purple, blue, pink Diamond, the April birthstone, needs no explanation. The hardest mineral…
previous month zodiac signs next month Aquamarine fact fileCrystal Structure: hexagonal Chemical Composition: Beryl – Beryllium Aluminum Silicate ( Be3Al2(Si16O18) ) Hardness: 7.2 to 8 MOHSRefractive Index: 1.57-1.59 Colors: Pale blues, light blues, yellowish blues, green, greenish-blue Aquamarine and Bloodstone…
previous month zodiac signs next month Garnet fact file Crystal Structure: isometric,dodecahedral Chemical Composition: silicate mixtures of magnesium, iron, and aluminum Hardness: 6 ½ to 7 ½ MOHSRefractive Index: 1.7 to 1.8 Colors: Every color but Blue Garnets ( Rhodolite…
previous month zodiac signs next month January Aquarius (jan 21 – feb 21) Pisces (Feb 22 – Mar 21) March Amethyst fact fileCrystal Structure: hexagonal Chemical Composition: Transparent Quartz – Silicon Dioxide, SiO2 Hardness: 7 MOHSRefractive Index: 1.5 Colors: deep…