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Natalyite

Year of discovery: 1984 (Pereval marble querry, Russia)

Locality list:

• NaVSi₂O₆
• [Na⁺][V³⁺][(SiO₃)₂]^4-

• Class: Na pyroxene group < Pyroxene supergroup
• Class: Inosilicate (Single chain)
• Variety: Chrome-acmite (+Cr)

• V => Al: Jadeite
• V => Mn: Namansilite
• V => Cr: Kosmochlor
• V => Fe: Aegirine
• V => Sc: Jervisite
• V => Ti: Colomeraite

• Color: Green with a yellow tint
• Streak: Green
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Good on {110} (2 planes), Parting on {001} (1 plane)
• Hardness: 6.5-7
• Density: 3.6

• System: Monoclinic
• Group: 2/m, B2/b
• Lattice: a=9.6, b=8.7, c=5.3, β=107.2