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


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)

Lawsonite

Size: 0.32 x 0.26 cm
Weight: 0.09 ct
Origin: California / USA

Photo by kind permission of © www.steveperrygems.com

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
Lawsonite Mineral

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
Lawsonite Mineral
Lawsonite

Size: 0.94 x 0.73 cm
Weight: 2.23 ct
Origin: California / USA

Photo by kind permission of © www.steveperrygems.com

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
Lawsonite Mineral

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