Tonalite Rock Assorted Colors Approx 1 Inch w Info Card

Tonalite Rock Assorted Colors Approx 1 Inch w Info Card

Overview

Tonalite Rock Assorted Colors Approx 1 Inch w Info Card

Warnings

Tonalite Rock Assorted Colors Approx 1 Inch w Info Card

Regular price $2.49 In Stock
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Overview

Tonalite Rock Assorted Colors Approx 1 Inch w Info Card

Warnings

Product Details

Tonalite Rock Assorted Colors Approx 1 Inch
Information Card Included
   
   Igneous rocks are classified and named based on the percentages of minerals that make up the rock. Tonalite is an igneous rock that looks very similar to granite. In face, most people can't tell them apart. Tonalite is formed by cooling magma, the same way that granite is formed, but tonalite has an average of 10% quartz, while granite averages 27% quartz. Tonalite also has a higher percentage of plagioclase feldspar--a mixture of sodium and calcium aluminum silicates. 
   Because it is very hard and durable, tonalite is used as a building material. It is a medium gray color with dark inclusions that sometimes look as if they once were a fluid. The dark minerals usually are hornblende and biotite. This tonalite was treated with compounds to make it colorful, then tumbled and polished to make it smooth and shiny.
   
   Picture is representative of the specimen you will receive.  Each rock is unique and will vary in shape, size and appearance.  No two rocks will be exactly alike. 
Origin: Europe
You will receive 1 specimen per purchase.

Ages 8 and older

Additional Information

SKU

SBV-R429

Weight

0.1 lb

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