The star that Black Star Diopside displays is always a white, four-pointed one. It is the reflection of light through these needle-like crystals of magnetite that causes the star effect to occur, a phenomenon known as asterism. In a few instances, another mineral known as magnetite (a magnetic iron oxide) was also present, and also crystallized to form very fine, submicroscopic needle–like crystals that aligned parallel to each other within the diopside matrix. As molten rock began to cool, the diopside present in the molten mix crystallized, doing so in successive layers. The diopsides (calcium magnesium silicate) vary in colour from the rich green of Chrome Diopside, to the light blue of Violan and Black Star’s dark green to jet-black.īlack Star Diopside formed in the aftermath of volcanic activity. A friend to academics and energy workers alike, this gem, which owes its brilliant star to mineral inclusions, is both emotionally soothing and grounding.Ĭhemical Composition: CaMG(Si2O6), Calcium Magnesium Silicateīlack Star Diopside belongs to the magnesium based Diopside group of minerals that form in metamorphic and igneous rocks. Enigmatic Black Star Diopside intrigues us with its blazing white four-pointed star, which shines brilliantly from the stone’s dark depths.
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