Russian Natrolite Tumbles

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Russian natrolite is a rare sodium aluminum silicate mineral that's part of the zeolite group. It's usually white or colorless, but can also be reddish, yellowish, gray, brown, green, or bluish

  • Hardness: 5–5.5 on the Mohs scale
  • Crystal structure: Orthorhombic or pseudo-tetragonal
  • Luster: Vitreous, pearly, or silky
  • Transparency: Transparent to opaque
  • Specific gravity: 2.2

Average size: .5 inches


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