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Faden Quartz & Actinolite

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PDM611120

Faden Quartz & Actinolite

Description Tabs

Description
Locality: 
Pondiellos Pass, Panticosa, Hoya de Huesca, Aragón, Spain
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 1.9 × 0.7 cm
Description

Transparent, tabular, doubly-ended quartz crystals with a classic white thread-like zone running through the interior (faden quartz). The matrix is form by acicular green crystals of actinolite that are also included in the quartz.

Self-collected in October/1996 at about 2700m high in trekking path to the Garmo Negro summit (3051m). From my own collection.

Mineral Data
What's on the rock

Actinolite

Formula: 
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Strunz: 
9.DE.10
Crystal System: 
Monoclinic - Prismatic
Hardness: 
5.0 - 6.0
Streak: 
White

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