Cave Onyx
A variety of 'Cave Calcite' [Calcite]
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About Cave Onyx
Formula:
CaCO3
Name:
From its similarity to onyx and its limestone origins.
A variety of banded calcite of karst (stalagmitic) origin showing patterns similar to onyx. Often cut and used as a decorative stone.
Note: the name 'onyx' is used frequently for materials made from this material. This is incorrect and confusing and should not be encouraged. True onyx is quartz (hardness 7); this material is much softer (hardness 3) and has very much lower acid resistance.
This material is characteristic of karst environments, and can be found worldwide.
Note: the name 'onyx' is used frequently for materials made from this material. This is incorrect and confusing and should not be encouraged. True onyx is quartz (hardness 7); this material is much softer (hardness 3) and has very much lower acid resistance.
This material is characteristic of karst environments, and can be found worldwide.
Unique Identifiers
Mindat ID:
3000 (as Cave Onyx)
859 (as Calcite)
859 (as Calcite)
Long-form identifier:
mindat:1:1:3000:3 (as Cave Onyx)
mindat:1:1:859:4 (as Calcite)
mindat:1:1:859:4 (as Calcite)
Pronunciation of Cave Onyx
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Chemistry of Cave Onyx
Mindat Formula:
CaCO3
Element Weights:
Elements listed:
Synonyms of Cave Onyx
Other Language Names for Cave Onyx
German:Onyxmarmor
Common Associates
Associations Based on Photo Data:
| 1 photo of Cave Onyx associated with 'Calcite-Rhodochrosite Series' | |
| 1 photo of Cave Onyx associated with 'Travertine' |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Cave Onyx
mindat.org URL:
https://www.mindat.org/min-3000.html
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References for Cave Onyx
Reference List:
Localities for Cave Onyx
Showing 53 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Pedrara Quarry, El Marmol, San Felipe Municipality, Baja California, Mexico