List of Gemstones | Rare Minerals | Gem stones | Gems » Zeolite Group http://www.all-gemstones.com www.all-gemstones.com    Thu, 06 May 2010 12:29:47 +0000 http://wordpress.org/?v=2.8.6 en hourly 1 Thomsonite http://www.all-gemstones.com/thomsonite http://www.all-gemstones.com/thomsonite#comments Fri, 08 Jan 2010 05:44:06 +0000 admin http://www.all-gemstones.com/?p=1391 Refractive Index : 1.540 – 1.515 (+0.015 – 0.018) Optical Characteristic : DR, B+ , AGG Specific Gravity : 2.35 (+0.05 – 0.10) Formula : NaCa2AI5Si5O20.6(H2O) Crystal System : Orthorhombic Variety/Species : Thomsonite Species/Group : Zeolite Group Birefringence : 0.021 Dispersion : N/A Hardness : 5 to 5.5 Toughness : Fair Ultrasonic : Never Steam : Never UV Long : Inert to moderate UV Short : Inert Pleochroism : None Strength : N/A
Pleochroism Colors : None Heat : Avoid heating Acids : Attacked by acids and/or chemicals Light : stable Polish Luster : vitreous to pearly Fracture : Uneven Fracture Luster : Dull to silky Clarity Type : N/A Tones : N/A Saturations : N/A Cause of Color : unknown Enhancements : none Cleavage : Perfect 1 direction. Color Range : Brown, yellow, orange, gray struture and color patterns produce “eyes”. Transparency : translucent to opaque Phenomena : None
Separations : Thomsonite from-
Agate : Appearance, SG, fracture, RI

Onyx marble calcite : SG, appearance, RI, (birefringence)

Thulite : SG, appearance, RI (possibly)

Unakite : SG, appearance, RI(possibly) Identifying Characteristics and information
Spot RI is approximately 1.53. Banded or mottled.

Radiating circular aggregates produce “eyes”.

May fluorescence patchy brown and white (LW) Spectral Data
not diagnostic. Trade Names and Misnomers
Bagotite
Comptionite(M)
Eye Stone
Faroelite
Gibsonite(S)
Lake superior Agate(M)
Lintonite(S)
Ozarkite(S)
Thomsonite ]]> http://www.all-gemstones.com/thomsonite/feed 0 Yugawaralite http://www.all-gemstones.com/yugawaralite http://www.all-gemstones.com/yugawaralite#comments Tue, 04 Aug 2009 07:57:00 +0000 admin http://www.all-gemstones.com/?p=1527 Refractive Index : 1.504 – 1.495 Optical Characteristic : DR, Biaxial negative Specific Gravity : 2.25 – 2.23 Formula : CaAI2Si6O16.4(H2O) Crystal System : Monoclinic Variety/Species : Yugawaralite Species/Group : Zeolite Group Birefringence : 0.009 Dispersion : Hardness : 4.5 Toughness : Poor Ultrasonic : Never Steam : Never UV Long : Inert UV Short : Inert Pleochroism : None Strength : N/A

Pleochroism Colors : None Heat : Sensitive Acids : Sensitive Light : Stable Polish Luster : Vitreous Fracture : Uneven Fracture Luster : Clarity Type : N/A Tones : N/A Saturations : N/A Cause of Color : Enhancements : None Cleavage : Imperfect Color Range : Colorless, white Whitish Transparency : Transparent to Translucent Phenomena : None
Separations : Yugawaralite from- Identifying Characteristics and information
Very brittle.

Extremely rare Spectral Data
None Trade Names and Misnomers
Yugawaralite ]]> http://www.all-gemstones.com/yugawaralite/feed 0