Origin
Brazil, Southern and central Africa, Madagascar, Color: yellow, Hardness: 7, Refractive index: 1.54 1.55, Density: 2.65 2.66, Chemical composition: SiO2, Crystal structure: hexagonal, Origins: Widespread; best stones come from Brazil. Citrine is one of the least expensive gemstones. Even very big pieces, 50 carats and more, can be easily found on the market. Greenish-yellow and orange stones are more valuable, and heat treatment is often applied to enhance the yellow color., Yellow, brown, Yellow, brown, Yellow, brown, Yellow, brown, Yellow, brown, Yellow, brown, Yellow, brown, Yellow, brown, Yellow, brown, Yellow, brown
Ethiopia, Afghanistan, China, Australia, Color: light greenish blue, pale yellow or colorless. Hardness: 5.5 6, Refractive index: 1.58 1.61, Density: 3.04 3.11, Chemical composition: LiAl(PO4)F, Crystal structure: triclinic, Origins: Brazil (major source); also found in USA, Germany, France, UK, Finland, Norway, Sweden, Namibia, Zaire, Ethiopia, Afghanistan, China and Australia., Axinite is a collectors stone that is rarely used in jewelry.
Color
Yellow
Brown, Green, White, Colorless, Yellow, Green, Blue, gray, Brown, pink, White, Yellow, gray, Greenish
Fracture
ConchoidalMichael OâDonoghue, Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)
Sub-Conchoidal, Irregular/uneven, Sub-Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)