Mineral (Variety): Cobalt Spinel Color: blue Intensity: intense Zoning: no Origin: Sri Lanka Weight: 0,57 ct Dimensions: 6,0 x 4,5 x 3,1 mm Cut: oval Clarity: inclusions Treatment: none Use:…
The product picture is approximately the same magnification as a view trough the 10x loupe. Please have a look at the second photo to get an idea how the stone…
Formula: (Fe) Ca2Fe2+Al2B[4][O|OH|(Si2O7)2, (Mg)Ca2MgAl2B[4][O|OH|(Si2O7)2], (Mn) Ca2Mn2+Al2B[4][O|OH|(Si2O7)2] Colour: (Fe) shades of brown, violet with appropriate orientation, partially zoned with blue spots. (Mg) Delicate pinks, violets and blues, strong orange and yellow…