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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Siliceous-rock

A rock classification type
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00324510017271922034821.jpg
Flint

Dyke Park, Stamford, Fairfield County, Connecticut, USA
03908190017271922054631.jpg
Flint

Pices Fanes, Mareo, Puster Valley District, South Tyrol, Trentino-Alto Adige/Südtirol, Italy
04948990017271922092044.jpg
Chert

Owingsville, Bath County, Kentucky, USA
00324510017271922034821.jpg
Flint

Dyke Park, Stamford, Fairfield County, Connecticut, USA
03908190017271922054631.jpg
Flint

Pices Fanes, Mareo, Puster Valley District, South Tyrol, Trentino-Alto Adige/Südtirol, Italy
04948990017271922092044.jpg
Chert

Owingsville, Bath County, Kentucky, USA
00324510017271922034821.jpg
Flint

Dyke Park, Stamford, Fairfield County, Connecticut, USA
03908190017271922054631.jpg
Flint

Pices Fanes, Mareo, Puster Valley District, South Tyrol, Trentino-Alto Adige/Südtirol, Italy
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About Siliceous-rockHide

Rocks composed of more than 50% silica of biogenic or chemical origin.


Unique IdentifiersHide

Mindat ID:
49374
Long-form identifier:
mindat:1:1:49374:7

Classification of Siliceous-rockHide

Sub-divisions of Siliceous-rockHide

Mineralogy of Siliceous-rockHide

Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Opal-ASiO2 · nH2O
Silica > Opal-CSiO2 · nH2O
Silica > Opal-CTSiO2 · nH2O
Silica > QuartzSiO2

Age distributionHide

Internet Links for Siliceous-rockHide

References for Siliceous-rockHide

Reference List:
Quick NavTopAbout Siliceous-rockUnique IdentifiersClassification Sub-divisions Mineralogy Age distributionInternet Links References
 
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