Aloian, Molly.

What are crystals? / Molly Aloian. - St. Catharines, Ont. : Crabtree Pub., 2012. - 32 p. : col. ill., col. map ; 29 cm. - Let's rock. . - Let's rock (St. Catharines, Ont.) .

Includes index.

The origins of crystals -- Earth layers -- How doe crystals form? -- Crystal systems -- Diamonds -- Quartz -- Corundum -- Beryl -- Using crystals -- Crystal caves -- Gems and gemstones -- Other crystals -- Birthstone fun.

Learn all about crystals, minerals that have hardened into distinct shapes with regular repeating patterns.

ISBN: 9780778772132 (bound) 0778772136 (bound) 9780778772187 (pbk.) 0778772187 (pbk.)

Subjects--Topical Terms:
Crystals
Crystallography.

Dewey Class. No.: 549