Diamond

Synthetic diamond: Colourless, yellow, brown, green, blue, red, pink; Transparent; Hardness 10; RI 2.417; Opt. isotropic; SG 3.52; Perfect cleavage; Fluorescence: SW - distinct yellow, yellowish-green or whitish-yellow; Inclusions: metallic residues (partly magnetic), internal growth and colour zoning - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 31 10Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 3.50 to 3.53Walter Schumann, Gemstones of the world (2001) More from other references PerfectUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references Conchoidal,SplinteryWalter Schumann, Gemstones of the world (2001) More from other references High temperatures can induce etchings on the facets. Therefore special care must be taken during soldering!Walter Schumann, Gemstones of the world (2001) 2.417 to 2.419Walter Schumann, Gemstones of the world (2001) More from other references IsotropicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) Anomalous double refractionMore from other references NoneWalter Schumann, Gemstones of the world (2001) 0.044Michael O?Donoghue, Gems, Sixth Edition (2006) More from other references Colorless, yellow, brown, rarely green, blue, reddish, orange blackWalter Schumann, Gemstones of the world (2001) More from other references Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references Adamantine,GreasyMichael O?Donoghue, Gems, Sixth Edition (2006) Adamantine to greasyMore from other references Very variable: Colorless and yellow: mostly blue; Brownish and greenish: often greenWalter Schumann, Gemstones of the world (2001) More from other references Weaker reaction if any. Yellow: rare weak yellow to orange. Blue: rare yellowish to bluishHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Usually blue (and yellow phosphorescence). Colorless (near-colorless): tylically strong blue. Yellow: inert to strong blue, yellow (also green, rarely orange). Pink (and red): mostly blue (yellowish to orangy phosphorescence). Blue: rare orangy. Green, brown: greenHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references IsometricHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Mainly octahedrons, also cubes, rhombic dodecahedrons, twins, plates.Walter Schumann, Gemstones of the world (2001) More from other references It is known to be the product of the deep-seated crystallization of ultrabasic igneous magmas which have intruded as dikes or pipes of kimberlite or lamproiteMichael O?Donoghue, Gems, Sixth Edition (2006) Inclusions: olivine, garnet, diopside, graphite, tension and cleavage cracks, growth zoning, twinning lamellaes - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 31 Diamond information at mindat.org Angola  Khar'kiv et al. (1992) Khar'kiv et al. (1992) Levinson et al. (1992) Australia  Barron et al. (1996) gemexplorer.org Jaques (1994) Jaques (1994) Jaques (1994) Chapman et al. (1996), Gemexplorer.org Botswana  Levinson et al. (1992) Levinson et al. (1992) Levinson et al. (1992) Brazil  Cassedanne (1989) Cassedanne (1989) Cassedanne (1989) Cassedanne (1989) Cassedanne (1989) Cassedanne (1989) Cassedanne (1989) N. Haralyi (1998) Cassedanne (1989) Canada  gemexplorer.org Pell (1994) Central African Republic  Censier and Tourenq (1995) China  R. Li (1999) Janse (1995) Janse (1995) Janse (1995) Janse (1995) Dobbs et al. (1994) DR Congo  Janse (1995) Janse (1995) Ghana  Levinson et al. (1992) Levinson et al. (1992) Guinea  A. Janse (1999) Guyana  Levinson et al. (1992) Levinson et al. (1992) India  Chatterjee and Rao (1995) gemexplorer.org Indonesia  Janse and Sheahan (1995) gemexplorer.org Janse and Sheahan (1995) Ivory Coast  Janse (1996) Lesotho  gemexplorer.org Mali  Janse (1996) Myanmar  U Hlaing (1999) Kammerling et al. (1994) Hlaing (1990) Hlaing (1990) Namibia  Janse (1995) Janse (1995) Gurney et al. (1991) Russia  Possoukhova et al. (1999) Smirnov (1993) 33rd International Geological Congress (2008) session AAA-11 Metallogeny of the Arctic region: Diamondiferous kimberlites of the East Eurorean Platform: Specific features; Smirnov (1993) Smirnov (1993) Russian gemstones encyclopedia, V. V. Bukanov, 2006, p. 36 Levinson et al. (1992) Levinson et al. (1992) Levinson et al. (1992) Duval et al. (1996) Duval et al. (1996) Duval et al. (1996) Duval et al. (1996) Duval et al. (1996) Levinson et al. (1992) A. Janse (1999) A. Janse (1999) Sierra Leone  A. Janse (1999) gemexplorer.org Levinson et al. (1992) South Africa  A. Janse (1999) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Janse (1995, 1996) Gurney et al. (1991) Janse (1995, 1996) Tanzania  gemexplorer.org Dirlam et al. (1992) USA  Pell (1994) Johnson and Koivula (1996) Venezuela  Coenraads et al. (1994) Coenraads et al. (1994) Zimbabwe  gemexplorer.org Duval et al. (1996) gemexplorer.org