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Rutile Twin

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PDM1148759

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Description
Locality: 
Rutongo, Kigali City Province, Rwanda
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 1.3 × 1 cm
Description

Nice cluster of rutile crystals forming a cyclic twinning on {101}. It is a complete, floater piece, with some other smaller rutile crystals. It shows rounded corners and erosions because these were founds in fluvial terraces at the Rutongo area, worked mainly for cassiterite. Extremely rare locality in collections.

Collected in 1963 by Professor A. Delvaux (1919-1998).

Combine specimens to reduce shipping costs!.

Mineral Data
What's on the rock

Rutile

Formula: 
TiO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal - Ditetragonal Dipyramidal
Hardness: 
6.0 - 6.5
Type Locality: 
Rutile locality, Horcajuelo de la Sierra, Madrid, Spain

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