1 Spinel – Gems stone
Pink Color Tourmaline Specimen

Pink Color Tourmaline Specimen

Aquamarine Specimen,Crystal Tourmaline,Green Color Tormaline More »

Blue sapphire gemstone Specimen

Blue sapphire gemstone Specimen

Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen,Crystal Tourmaline, More »

Tourmaline Cuts Shapes

Tourmaline Cuts Shapes

Tourmaline Cuts Shapes,Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen, More »

watermelon Tourmaline

watermelon Tourmaline

watermelon Tourmaline,Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen, More »

Blue sapphire gemstone Specimen

Blue sapphire gemstone Specimen

watermelon Tourmaline,Blue sapphire gemstone Specimen,sapphire crystal Specimen,Tourmaline Specimen, More »

 

Category Archives: Spinel

Spinel

SPINEL

 

 

COLOUR : Red,pink,blue to mauve

 

COMPOSITION :MgAI2O4

CRYSTAL STRUCTURE :cubic

HARDNESS :8specific gravity :3.6

LUSTER:Vitreous

TRANSPARENCY :  Transparent to translucent

METAPHYSICA:Calm,loyalty, stress reliefmeditation,crisis aversion,strength,self-healing ,purpose

OTHER:Very high melting point of 2135 Celsius

Spinel is found in a wide range of colours due to the presence of various impurities ,and is transparent to almost opaque .Red spinel coloured by  chromium and iron is the most popular ,although for many years it was thought  to be a variety of ruby .The orange –yellow or orange-red variety is called rubicelle (a diminutive of the French  word for ruby ).Blue spinel is coloured by iron,and less commonly by cobalt .Occasionally, inclusions of crystals such as magnetite or apatite may occur ,and some Srilankan spinel may include zircon crystals surrounded by brown haloes .Star stones are rare ,but when cut encabochon may show 4-rayed or 6 rayed stars.

OCCURRENCE : Spinel occurs in granites and metamorphic rocks,  and is often found in association with corundum .Octahedral crystals and waterworn pebbles in a wide range of colours are found in the gem gravels of Burma ,Srilanka,and Madagascar .Other localities include Afghanistan ,Pakistan, Brazil Australia ,Sweden ,Italy ,Turkey ,the former USSR,and the USA.

REMARK :Synthetic spinel has been manufactured since 1910 .It has been used to imitate diamond ,or coloured to imitate stone such as aquamarine and zircon .Blue synthetic spinel ,coloured by cobalt ,has been used to imitate sapphire .The name may derive from the Latin word spina, meaning little thorn referring little thorn ,reffering to the sharp points on some crystals .