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Chrome-Chalcedony

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

Search Engines:
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  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
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    Localities for Chrome-Chalcedony

    (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
      • Eskisehir 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).
    Mineral and/or Locality
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