Granite biotite crystal – scotland rock sample

All of our Rocks are 100% Genuine Specimens & come with a Certificate of Authenticity
**Please note: Some minerals may be propped up for photo purposes**

Specimen: Granite Biotite
Location: Scotland
Type: Igneous Rock
Size (picture scale cube=1cm):  41 x 29 x 53mm (1.61 x 1.14 x 2.09 inches)

All our rocks are carefully selected for educational study. They come in labelled trays. The trays are normally 3″ x 2″ size depending on the rarity of the specimen. Average specimen size is shown below. These are ideal for classroom teaching and are a size that can be easily passed round the classroom for students to get a feel for each type.

Biotite granite is a coarse grained, felsic intrusive rock, the minerals which make up a granite are typically quartz, feldspars and micas. In the case of biotite granite, the constituent minerals are milky (white) quartz, plagioclase feldspar which is often white and biotite mica crystals.

The image shows the ACTUAL specimen you will receive