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142 QUARTZ FAMILY. 3. The analysis of hyacinth given by Bergman, which is as follows, I refer to the cinnamon-stone: ■ - Alumi na, 40.; Silica, 25.; Carbonat of Lime, 20.; Iron, 13. VI. QUARTZ FAMILY. This family contains the following species: Quartz, Iron Flint, Hornstone, Flinty-slate, Flint, Calcedony, Heliotrope; Siliceous Sinter, Hyalite, Opal, Menelite; and Jasper. 1. Quartz. This species is divided into six subspecies, viz. Ame thyst, Rock-crystal, Rose or Milk Quartz, Common, Quartz, Frase, and Cats-eye. First Subspecies. Amethyst. This subspecies is subdivided into two kinds, viz. Common Amethyst, and Thick Fibrous Amethyst. 1 First