Collector's Guide to the Feldspar Group Spanish Black or Tan

Black or Tan

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Dawkins has equal ardor for the sacred truth of nature and renders here with typical virtuosity the glories and complexities of the natural world

Collector's Guide to the Feldspar Group Spanish Black or TanOver 100 vivid color photographs of beautiful feldspar minerals show each species in its geological context. The feldspar minerals, as a group, make up nearly sixty percent of the earths crust. Large crystals are found at many locales worldwide, in both igneous and metamorphic rocks. Often, feldspar forms the matrix for stunning gem crystals found in pegmatites. This book explains how feldspars are formed and the complicated structural features that