Twinned Staurolite in Garnet-Mica Schist matrix3D ModelNoAI
Locality: Tyrol, Austria
No.: 5716
Size: 8.4 x 3.4 x 2.8 cm
Formula: Fe(II)2Al9Si4O23(OH)
Type of rock: Metamorphic rock - foliated
Description: Staurolite is a reddish-brown to black nesosilicate mineral that crystallizes in the monoclinic system, has resinous to vitreous luster. It is also known as cross-stone; fairy stone; grenatite; staurotide. From Greek stauros, cross, alluding to the cruciform twins it displays in some cases. Staurolite is commonly found as 60° twins (https://skfb.ly/6Ut6v and https://skfb.ly/6TJFS), and less common as 90° cruciform twins.
Schist is a medium to coarse-grained, a strongly foliated rock rich in platy or elongated minerals. Schist forms during regional metamorphism. Composition may be highly variable. + more info
Website: http://geology.uaic.ro/muzee/mineralogie/
Concept & 3D-modelling by Andrei Ionut APOPEI
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