SKU: B_27_0019
A representative composition of tourmaline and quartz crystals. A well-formed tourmaline crystal features color zoning from olive green to almost black, set in a matrix of crystalline quartz. Next to the main tourmaline, a smaller tourmaline crystal with distinctly marked faces is visible.
Price: 32 EUR (139 PLN)
Availability: In stock
Location: Pakistan
Size: 11 x 10 x 21 mm
Weight: 2.7 g
Chemical formula: Na(Li,Al)₃Al₆Si₆O₁₈(BO₃)₃(OH)₄
Crystal system: Trigonal
Mohs hardness: 7.0–7.5