Lawsonite
Lavsonitas, Lawsoniet, Lawsonit, Lawsonita, Лавсонит, לאוסוניט, ลอว์ซอไนต์, 로소 나이트, ﾛｰｿﾝ石, 硬柱石
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formula:
CaAl2Si2O7(OH)2·H2O
Mineral class: silicates Crystal system: orthorhombic Mohs scale: 7.5 Density (g/cm3): 3.05 - 3.12 Refractive index: 1.665 - 1.684 Cleavage: different Colors: colorless, white, grey, pink, blue Transparency: transparent - translucent Luster: vitreous - greasy Fluorescence: - Pleochroism: weak. X = colorless, blue, yellow-brown; Y = colorless, blue-green, yellow-green; Z = colorless, yellowish Largest crystal: 5 cm? Deposits: worldwide Discovery: 1895 ? 1st Description: 1895 (Ransome, Leslie) Name: to honor the geology professor Andrew Cowper Lawson (1861-1952) |
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Lawsonite
Size: 0.32 x 0.26 cm Weight: 0.09 ct Origin: California / USA Photo by kind permission of © www.steveperrygems.com |
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Lawsonite
Size: 3.5 x 3.2 x 3 cm Origin: Valley Ford / Sonoma County / California / USA Photo by kind permission of © www.fabreminerals.com |
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Lawsonite Mineral
Size: 1.36 x 1.6 x 1.1 cm Origin: Tiburon Peninsula / Marin County / California / USA Photo by kind permission of © Danny Jones |
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Lawsonite
Size: 0.94 x 0.73 cm Weight: 2.23 ct Origin: California / USA Photo by kind permission of © www.steveperrygems.com |
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Lawsonite-(Cr)
Size: 2.7 x 1.8 x 0.9 cm Origin: Cape Marmari / Syros Island / Aegean Islands / Greece Photo by kind permission of © www.lucianabarbosa.com |
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