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Opal-CT from

Locality type:	City
Classification
Species:	Opal var: Opal-CT
Formula:	SiO2 · nH2O
Confirmation
Validity:	Believed Valid
Data
Mineral Data:	Click here to view Opal-CT data
Locality Data:	Click here to view Mapimí, Mapimí Municipality, Durango, Mexico
Data Identifiers
Mindat Occurrence Record ID:	817287
Long-form Identifier:	1:3:817287:7
GUID (UUID V4):	0
References
Fritsch, E., Gaillou, E., Ostroumov, M., Rondeau, B., Devouard, B., Barreau, A. (2004) Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru. European Journal of Mineralogy, 16, 743-752
Reference Search (possible matching items)
*(2005, September) Gems & Gemology* Vol. 41 (3) Gemological Institute of America**Journal (issue)jewelry. The center stone in the solitaire ring is 7.02 ct; the eternity ring, the choker necklace, and the...55 ct of colorless diamonds, respectively; and the bracelet contains 3.04 ct of pink and 11.74 ct of...make fine brown diamonds such as these (0.35–1.32 ct) an important segment of the colored diamond market...many at auction, during the mid1990s. This 100.2 ct emerald cut is near colorless (I) and internally...of the highest qualities generally larger than 0.3 ct, quite often colored a distinctive strong purplish