Beautiful unusual grayblack crystal stone cassiterite with a metallic sheen standing in the glass

Related tags:

• minerals
• chemistry
• chemical
• science
• laboratory
• atom
• amethyst
• microscope
• geology
• stone
• crystal
• black stone
• black metal
• natural stone
• gray
• force
• prism
• background gray
• black
• space
• background space
• variety
• bg black
• metallic
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