Provenite

Anahi Mine

MineUnknownDraft data

18.9667° S, 57.7981° W · Region only

Amethyst and Citrine from Santa Cruz, Bolivia, with photos of specimens from this locality.

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Minerals found here

AmethystCitrine

Amethyst at Anahi Mine

Mine best known for ametrine (amethyst-citrine sector zoning); plain amethyst crystals and plates are also produced

Large single amethyst crystal about 16 cm long with a gemmy purple top, from the Anahi mine, Bolivia.
Large single amethyst crystal about 16 cm long with a gemmy purple top, from the Anahi mine, Bolivia.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Large plate of amethyst crystals, some up to 15 cm, from the Anahi mine, Bolivia.
Large plate of amethyst crystals, some up to 15 cm, from the Anahi mine, Bolivia.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Large deep violet amethyst crystal about 20 cm long from the Anahi mine, Bolivia.
Large deep violet amethyst crystal about 20 cm long from the Anahi mine, Bolivia.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
SiO₂
Morphology
Large single crystals and plates of crystals
Typical size
Crystals up to about 15 cm on large plates
Color / luster
Rich to intense violet, in some crystals as isolated pastel blushes (dealer descriptions)
History
More than 100 tonnes of ametrine crystals were produced between 1989 and 1994

Sources: SRC-117 SRC-425 SRC-431

About Amethyst →

Citrine at Anahi Mine

Natural amethyst-citrine bicolour crystals; field and experimental work show the colour combination is not laboratory-made

Etched, elongated ametrine crystal (amethyst with yellow citrine hues) from the Anahi Mine, 12.7 cm long.
Etched, elongated ametrine crystal (amethyst with yellow citrine hues) from the Anahi Mine, 12.7 cm long.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Naturally etched ametrine crystal from the Anahi Mine with a purple interior and orange citrine hints, 12.1 cm long.
Naturally etched ametrine crystal from the Anahi Mine with a purple interior and orange citrine hints, 12.1 cm long.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Floating ametrine crystal from the Anahi Mine combining golden and purple zones, 7.4 cm long.
Floating ametrine crystal from the Anahi Mine combining golden and purple zones, 7.4 cm long.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
SiO₂
Morphology
Bicoloured crystals with amethyst and citrine sectors (sector colour zoning)
Color / luster
Violet amethyst sectors beside yellow-orange citrine sectors
History
More than 100 tonnes of ametrine crystals were produced from 1989 up to the 1994 report, yielding 40-80 kg of cutting rough per tonne

Sources: SRC-117 SRC-118

About Citrine →

Geology of the locality

Setting
Amethyst-citrine (ametrine) quartz crystals in the Murciélagos limestones
Type
Sedimentary
Host rock
Limestone
Region
Santa Cruz
Country
Bolivia

Coordinates are those of Puerto Suarez (Wikipedia), the nearest town I could confirm; the mine itself is not located precisely.

Sources: SRC-117 SRC-118 SRC-119

Sources

  1. SRC-117 · Article
    Amethyst-citrine (ametrine) from the Anahi mine, BoliviaVasconcelos, L.; et al. (as given in the URL; not verified) · 1994 · Gems & Gemology (Spring 1994)
  2. SRC-118 · Article
    Ametrine with smoky quartz layers (Yuruty mine)Gems & Gemology
  3. SRC-119 · Website
    Puerto SuarezWikipedia
  4. SRC-425 · Website
    Anahi MineAlbion Fire & Ice · albionfireandice.co.uk
  5. SRC-431 · Website
    Wikimedia Commons file pages: Quartz-121263.jpg, Quartz-153477.jpg, Quartz-160744.jpgRobert M. Lavinsky (photographer; text by dealer) · Wikimedia Commons

Draft data from the Provenite workbook. Check entries against the cited sources before relying on them. Photos are open-licence images from Wikimedia Commons; the author and licence are given with each photo.