Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Thaumasite from
Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA


06316040017676475505305.jpg
Thaumasite, etc.

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
09004350017272016939175.jpg
Thaumasite, etc.

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
04304690017272016959964.jpg
Thaumasite

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
06877020017272016967968.jpg
Thaumasite

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
08219050017675794519328.jpg
Thaumasite, etc.

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
07530650017363992503855.jpg
Thaumasite, etc.

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
00232990017363992515075.jpg
Thaumasite

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
01733830017363992513907.jpg
Thaumasite

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
06316040017676475505305.jpg
Thaumasite, etc.

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
04136560017272016971423.jpg
Thaumasite, etc.

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
04304690017272016959964.jpg
Thaumasite

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
06877020017272016967968.jpg
Thaumasite

Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
Locality type:Quarry
Classification
Species:Thaumasite
Formula:Ca3(SO4)[Si(OH)6](CO3) · 12H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Prehnite11
Hydroxyapophyllite-(K)10
Quartz5
Chlorite Group5
Amphibole Supergroup4
- var Byssolite4
Galena2
Bornite2
Actinolite1
Data
Mineral Data:Click here to view Thaumasite data
Locality Data:Click here to view Fairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
Photo GalleryView Gallery (11 photos)
Data Identifiers
Mindat Occurrence Record ID:65193
Long-form Identifier:1:3:65193:8
GUID (UUID V4):0
Nearest other occurrences of Thaumasite
5.6km (3.5 miles) ⓘCentreville, Culpeper Basin, Fairfax County, Virginia, USA
5.7km (3.5 miles) ⓘBull Run Quarry, Conklin, Loudoun County, Virginia, USA
7.0km (4.4 miles) ⓘVulcan Materials Company Crushed Stone Quarry (Manassas Quarry), Manassas, Prince William County, Virginia, USA
11.0km (6.9 miles) ⓘVirginia Crushed Stone Quarry, Loudoun County, Virginia, USA
27.1km (16.8 miles) ⓘOld Goose Creek Quarry, Leesburg, Loudoun County, Virginia, USA
References
Mineralogical Society of America - Handbook of Mineralogy
D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
 
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