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NEST BOXES & REFUGEES FOR WILD GARDEN ANIMALS
PIEDRAS PRECIOSAS. PROPIEDADES, IDENTIFICACIÓN Y USO
Thomas A.
Esta obra es un manual extenso y fiable sobre el mundo de las gemas y las piedras ornamentales. Presenta más de 200 piedras preciosas minerales, orgánicas y sintéticas, de manera clara, breve y de uso fácil. incluye información sobre las esctructuras cristalinas y los tipos de roca. Con fotografías asombrosas y esquemas precisos que permiten una identificación sencilla. Cada entrada presenta una tabla de referencia rápida de las propiedades en las que se incluye la dureza, la exfoliación y la fractura.
