$Natural Ruby specimen 318.80Cts weight, 51mm x 21mm x 30mm dimension stone A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum. Other varieties of gem-quality corundum are called sapphires. Category: Oxide mineral variety Formula: aluminium oxide withchromium, Al2O3:Cr Crystal system: Trigonal Crystal class: Hexagonal Mohs scale: hardness9.0 Luster: Subadamantine, vitreous, pearly Specific gravity: 3.97 – 4.05 Optical properties: Uniaxial - Refractive index: nω=1.768–1.772 nε=1.760–1.763 Ruby is a powerful stone to shield against negative energy, psychic attack, and energy vampirism, especially of the heart energy.Ruby is a stone of Divine creativity. It boosts your energy levels and promotes high self-esteem, intuition, and spiritual wisdom. According to astrology generally ruby should be worn in ring finger of right hand. Ruby is one of the most popular gemstones, and is used extensively in Jewelry. Ruby is used in all forms of jewelry, including bracelets, necklaces, rings, and earrings.$

$A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum. Other varieties of gem-quality corundum are called sapphires. Category: Oxide mineral variety Formula: aluminium oxide with chromium, Al2O3:Cr Crystal system: Trigonal Crystal class: Hexagonal Mohs scale: hardness 9.0 Luster: Subadamantine, vitreous, pearly Specific gravity: 3.97 – 4.05 Optical properties: Uniaxial - Refractive index: nω=1.768–1.772 nε=1.760–1.763 Ruby is a powerful stone to shield against negative energy, psychic attack, and energy vampirism, especially of the heart energy.Ruby is a stone of Divine creativity. It boosts your energy levels and promotes high self-esteem, intuition, and spiritual wisdom. According to astrology generally ruby should be worn in ring finger of right hand. Ruby is one of the most popular gemstones, and is used extensively in Jewelry. Ruby is used in all forms of jewelry, including bracelets, necklaces, rings, and earrings.$