The Freezing and Thawing Test

This test is conducted for the use of stones in regions where the temperature goes below the freezing point. The test consists of keeping a specimen of stone in water for 24 hours and then placing it in a freezing mixture at –12°C for 24 hours. The specimen is taken out and thawed (warmed) to atmospheric temperature. The procedure is repeated at least seven times after which the specimen is examined for any damage.