The Dorling Kindersley Handbooks are the most visually appealing guides on the natural world in the book marketplace. Featuring more than 500 full-color illustrations and photographs, along with detailed annotations, Dorling Kindersley Handbooks make identification easy and accurate.
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0rthorhombic agate aluminum amber Amethyst aquamarine Australia beads beryl birefraction blue Brazil Brilliant Cut brown Cabochon carved cat's-eye Chalcedony chrysoberyl collectors colorless coral Corundum Crystal structure Crystal structure Trigonal Crystals in Matrix Cubic Cushion Mixed Cut cut en cabochon dark demantoid deposits diamond Distinctive color emerald faceted Fluorite former USSR fracture fragile garnet Gem-quality gemstones gold green color grossular Hardness Hexagonal igneous rocks imitate inclusions iridescence ivory jewelry lapis lazuli layers lazulite localities include luster Luster Vitreous Crystal Madagascar massive material metamorphic rocks mineral Mixed Cut Monoclinic Myanmar Namibia OCCURRENCE opal opaque oxide pale pearls pegmatites Pendeloque perfect cleavage peridot pink pleochroic polished prisms pyrite quartz rare refractive REMARK rock crystal rubies rutile sapphire Si02 Trigonal silicate silver soft spinel Sri Lanka stone structure Trigonal Composition surface Synthetic topaz tourmaline translucent transparent Triclinic Trigonal turquoise usually variety Vitreous Crystal structure yellow yellowish zircon