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Chrome-Chalcedony

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Mtoroshanga (Mutorashanga), Mashonaland West, Zimbabwe

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A variety of Chalcedony

A variety of chalcedony colored deep green by Cr compounds. (Compare with the more common Chrysoprase variety of chalcedony, which is colored by nickel.) Chrome chalcedony found in an ancient Roman gem collection may have come from one of the chromium deposits in what is now Turkey. Present commercial production comes from Zimbabwe under the trade name "mtorolite", and from Bolivia under the trade name "chiquitanita".

Classification of Chrome-Chalcedony

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Other Names for Chrome-Chalcedony

Synonyms:
ChiquitanitaChrome-ChrysopraseChromium ChalcedonyMtorodite
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Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chrome-Chalcedony

Reference List:

- +
Phillips, G. & Brown, G. (1989) Mtorolite. Australian Gemmologist, 17, 205-207.

Webster, R. (1994) Gems: their sources, description and identification. 5th ed., P.G. Read (ed). (Butterworths, London)

Hyrsl, J. & Petrov, A. (1998) Journal of Gemmology, 26, 1, 43.

Internet Links for Chrome-Chalcedony

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    • Localities for Chrome-Chalcedony

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Bolivia
     
    • Santa Cruz Department
      • Chiquitos Province
    		Jaroslav Hyrsl and Alfredo Petrov (1998) Journal of Gemmology, 26, 1, 43.
    Turkey
     
    • Central Anatolia Region
      • Eskişehir Province
    		Cigdem Lule-Whipp (2006) Gems & Gemology, 42, 115.
    Zimbabwe
     
    • Mashonaland West
    		Phillips, G. & Brown, G. (1989) Mtorolite. Australian Gemmologist, 17, 205-207; Webster, R. (1994) Gems: their sources, description and identification. 5th ed., P.G. Read (ed). (Butterworths, London).
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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