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NEST BOXES & REFUGEES FOR WILD GARDEN ANIMALS
GUÍA DE BOLSILLO DE LAS PIEDRAS PRECIOSAS. 225 GEMAS Y PIEDRAS ORNAMENTALES
Hochleitner R.
Guía para identificar y diferenciar las 225 gemas y piedras ornamentales más impostantes, además de las piedras artificiales. Incluye fotografías de las piedras en bruto y talladas. Indicaciones sobre color, dureza, densidad, brillo, talla y yacimientos. Claves para diferenciarlas de otras piedras similares. Formas de talla.
