Provenite

Medina

AreaUnknownDraft data

16.2286° S, 41.4783° W · ± 10 km

Aquamarine and Beryl from Minas Gerais, Brazil, with photos of specimens from this locality.

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Minerals found here

AquamarineBeryl

Aquamarine at Medina

Aquamarine crystal 5.6 cm long with two terminations on the same end from Medina, Minas Gerais, Brazil.
Aquamarine crystal 5.6 cm long with two terminations on the same end from Medina, Minas Gerais, Brazil.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Doubly terminated aquamarine crystal in matrix from Medina, Minas Gerais, Brazil.
Doubly terminated aquamarine crystal in matrix from Medina, Minas Gerais, Brazil.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Large gem aquamarine crystal 23.5 cm long from Medina, Minas Gerais, Brazil.
Large gem aquamarine crystal 23.5 cm long from Medina, Minas Gerais, Brazil.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Intense blue aquamarine crystal with an unusual termination, about 2.9 cm, from Medina, Brazil.
Intense blue aquamarine crystal with an unusual termination, about 2.9 cm, from Medina, Brazil.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Aquamarine crystal 7.6 cm long with a surface etched by natural dissolution from Medina, Brazil.
Aquamarine crystal 7.6 cm long with a surface etched by natural dissolution from Medina, Brazil.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
Be₃Al₂Si₆O₁₈
Morphology
Large prismatic gem crystals, some doubly terminated or with unusual multiple terminations
Typical size
About 3-8 cm; exceptional crystals over 20 cm
Color / luster
Intense to deep blue, gemmy
Surface features
Some crystals show etch patterns from natural dissolution in the pocket
Availability
Unknown

Sources: SRC-750

About Aquamarine →

Beryl at Medina

Long, doubly terminated golden-yellow heliodor crystal from Medina, Minas Gerais, Brazil.
Long, doubly terminated golden-yellow heliodor crystal from Medina, Minas Gerais, Brazil.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Second view of a golden-yellow heliodor crystal from Medina, Minas Gerais, Brazil.
Second view of a golden-yellow heliodor crystal from Medina, Minas Gerais, Brazil.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
Be₃Al₂Si₆O₁₈
Morphology
Long, doubly terminated prismatic crystal
Typical size
About 10 cm long on the pictured specimen
Color / luster
Golden yellow (heliodor); vitreous
Availability
Unknown

Sources: SRC-699

About Beryl →

Geology of the locality

Region
Minas Gerais
Country
Brazil

Coordinates of the municipality from Wikipedia; the specimen is only labelled to Medina. No second source for beryl here was opened.

Sources: SRC-700 SRC-699

Sources

  1. SRC-700 · Website
    Medina, Minas GeraisWikipedia contributors · Wikipedia
  2. SRC-699 · Website
    File:Beryl-tuc09113abg.jpgRobert M. Lavinsky · Wikimedia Commons
  3. SRC-750 · Website
    File:Beryl-164081.jpgRobert M. Lavinsky · 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.