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Goosecreekite
Current inventory:  0 gems
 

Goosecreekite

  
Goosecreekite is named for the type locality, the New Goose Creek Quarry (Luck Company Quarry), Leesburg, Loudoun County, Virginia, USA.

Discovered in 1980;   IMA status: Valid (IMA approved).

 

Chemistry

 

 

Chemical Formula:

CaAl2Si6O16 · 5(H2O)

 

Hydrated Calcium Aluminum Silicate

Molecular Weight:

608.62 gm

Composition: 

Calcium

6.59 %

Ca

9.21 %

CaO

Aluminum

8.87 %

Al

16.75 %

Al2O3

Silicon

27.69 %

Si

59.23 %

SiO2

Hydrogen

1.66 %

H

14.80 %

H2O

Oxygen

55.20 %

O

 

 

 

100.00 %

 

100.00 %

= TOTAL OXIDE

 

 

 

  

 

Classification

   

   

Mineral Classification:

Silicates (Germanates)

Strunz 8th Ed. ID:

8/J.23-60

Nickel-Strunz 10th Ed. ID:

9.GB.25 

 

9.GB.25
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H
2O; zeolite family
B : Chains of single connected 4-membered rings

Related to:

Zeolite Group. Heulandite - Barium-Brewsterite Series. Dimorphous with Epistilbite.

 

 

Crystal Data

   

   

Crystallography:

Monoclinic - Sphenoidal

Crystal Habit:

As equant euhedral crystals, highly curved, to 4 cm; in polycrystalline aggregates.

Twinning:

None

 

 

Physical Properties

   

 

Cleavage:

[010] Perfect

Fracture:

Irregular/Uneven

Tenacity:

Brittle

Moh's Hardness:

4.5

Density:

2.21 (g/cm3)

Luminescence:

None

Radioactivity:

Not Radioactive

 

 

Optical Properties

   

   

Color:

Colorless, White

Transparency:

Transparent

Luster:

Vitreous to Pearly on crystal faces

Refractive Index:

1.495 - 1.502  Biaxial ( - )

Birefringence:

0.007

Dispersion:

Relatively Weak

Pleochroism:

None

 

 

Occurances

   

   

Geological Setting:

A late-stage mineral in vugs and fractures in a Triassic diabase (Goose Creek Quarry, Virginia, USA); in cavities in basalt (Nasik, India).

Common Associations:

Actinolite, Albite, Apophyllite, Babingtonite, Chlorite, Epidote, Prehnite, Quartz, Stilbite, Titanite (Goose Creek quarry, Virginia, USA); Quartz (Nasik, India).

Type Locality:

New Goose Creek Quarry (Luck Company Quarry), Leesburg, Loudoun Co., Virginia, USA

Year Discovered:

1980

View mineral photos:

Goosecreekite Mineral Photos and Locations

 

 

More Information

   

   

 

Mindat.org
Webmineral.com

 

 


Goosecreekite is one of the rarest of the Zeolite Group of minerals that includes over 40 minerals and these gem-type minerals: Analcime, Barrerite, Chabazite, Epistilbite, Gmelinite-Na, Goosecreekite, Mordenite, Natrolite, Pollucite, Scolecite, Stellerite, Stilbite, Thomsonite and Yugawaralite. Goosecreekite is one of the most unusually named minerals. It is named after the New Goose Creek Quarry in Loudoun County, Virginia, USA. Goosecreekite is found in the vesicles or bubbles of volcanic rock as are most other Zeolites. Goosecreekite is a very rare mineral and extremely rare as a faceted gem.

Goosecreekite is found in only three locations: the type locality at the New Goose Creek Quarry, Leesburg, Loudoun County, Virginia, USA; exceptional crystals are found at the Pandulena Quarry, Nasik, Maharashtra, India; and the OberbaumÄuhle Quarry, Windischeschenbach, Bavaria, Germany.
 

  
Goosecreekite gems for sale:

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