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The Acid Test

By , About.com Guide

Every serious field geologist carries a small bottle of acid to perform this quick field test, used to distinguish the most common carbonate rocks, dolomite and limestone. A few drops of the acid are put on the rock, and limestone responds by fizzing vigorously. Dolomite fizzes only very slowly. Here are some pictures made in a more controlled setting.

Images 1-5 of 5

The real thingPassing the Acid TestCould be eitherMystery CarbonateNot calciteCalcite Test FailsDefinitely a carbonateCrushed Carbonate Mineral
A slow burnDolomite Passes the Acid Test

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