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Black tourmaline on matrix
€241.76
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Black Tourmaline in Pegmatitic Matrix from Brazil
This is a magnificent large specimen of black tourmaline in pegmatitic matrix, where schorl crystals are distributed over a light matrix of feldspar and quartz. It is a very representative piece of the classic formations from Minas Gerais.
Main features:
- Approximate measurements: 33 cm long, 10 cm high and 19 cm wide
- Weight: about 6.7 kg
- Composition: main matrix of feldspar, possibly orthoclase, with presence of albite, black tourmaline (schorl) crystals and translucent areas of quartz
- Origin: Minas Gerais, Brazil
Mineralogical details:
The black tourmaline crystals appear in well-defined aggregates, embedded in a matrix of potassic feldspar with areas of albite and veins of translucent quartz. This mineralogical assemblage is a very typical example of Brazilian pegmatite, appreciated for the marked contrast between the dark crystals and the light host rock.
Points to note:
In pegmatite specimens with exposed crystals it is common for small fragments to detach occasionally, which is characteristic of this type of natural formation.
Número de Lote: 1175-TRB05-15_1
Black tourmaline on matrix