Ametrine
A variety of Quartz
This page kindly sponsored by Denise Marissa Herud
About Ametrine
Formula:
SiO2
Name:
Combination of "amethyst" and "citrine".
A variety of Quartz
Ametrine crystals are made of alternating sectors of purple and yellow to orange color. Slabs cut perpendicular to the c axis of the crystal look a bit like a pinwheel. The purple sectors are situated under the positive rhombohedral faces (r), and the yellow sectors under the negative rhombohedral faces (z).
While the purple sectors are made of amethyst, the yellow or orange sectors are not made of citrine, because they are colored by inclusions of iron compounds and would more properly called ferruginous quartz. Accordingly, upon heating ametrine the purple sectors pale, while the yellow-orange sectors keep their color.
Ametrine has been synthesised hydrothermally in Russian laboratories (Balitsky et al., 1999).
Ametrine crystals are made of alternating sectors of purple and yellow to orange color. Slabs cut perpendicular to the c axis of the crystal look a bit like a pinwheel. The purple sectors are situated under the positive rhombohedral faces (r), and the yellow sectors under the negative rhombohedral faces (z).
While the purple sectors are made of amethyst, the yellow or orange sectors are not made of citrine, because they are colored by inclusions of iron compounds and would more properly called ferruginous quartz. Accordingly, upon heating ametrine the purple sectors pale, while the yellow-orange sectors keep their color.
Ametrine has been synthesised hydrothermally in Russian laboratories (Balitsky et al., 1999).
Visit gemdat.org for gemological information about Ametrine.
Unique Identifiers
Mindat ID:
7606 (as Ametrine)
3337 (as Quartz)
3337 (as Quartz)
Long-form identifier:
mindat:1:1:7606:3 (as Ametrine)
mindat:1:1:3337:0 (as Quartz)
mindat:1:1:3337:0 (as Quartz)
GUID
(UUID V4):
(UUID V4):
b024408f-95e8-40ee-89a1-77da22901bd4 (as Ametrine)
4ca61d6f-75f8-4208-8fb2-3b0eecbcd8f0 (as Quartz)
4ca61d6f-75f8-4208-8fb2-3b0eecbcd8f0 (as Quartz)
Pronunciation of Ametrine
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Chemistry of Ametrine
Mindat Formula:
SiO2
Elements listed:
Synonyms of Ametrine
Other Language Names for Ametrine
Spanish:Bolivianita
Common Associates
Associated Minerals Based on Photo Data:
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 Ametrine
mindat.org URL:
https://www.mindat.org/min-7606.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Ametrine
Reference List:
Localities for Ametrine
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Bolivia | |
| minerals.gps.caltech.edu (n.d.) |
Brazil | |
Sauer (1982) | |
... | |
Canada | |
| Ontario Gem Company |
India | |
| minerals.gps.caltech.edu (n.d.) |
Mozambique | |
| Geotrade Bohemia |
South Africa | |
| - (Error for yellow iron-stained amethyst) +1 other reference |
USA | |
| Rocks & Minerals 82:415-418 |
Anahi Mine, La Gaiba mining district, Ángel Sandoval Province, Santa Cruz, Bolivia