Aquarius; white are under the Heavenly Pisces; yellow or Oriental Topaz and Rubies are under the Heavenly Leo. Oriental Amethyst is under the Heavenly Sagittarius. _Where found_: Ceylon, China, Burma, Russia, East Indies, United States of America, Australia (chiefly Queensland), etc. DIAMOND DIAMOND—BOART _Crystalline System_: Isometric. _Forms_: Octahedron, dodecahedron. Crystals frequently twinned. _Hardness_: 10. Scratches every other stone. _Lustre_: Adamantine. Transparent and when dark, translucent. _Refraction_: Single. _Chemical Composition_: Pure Carbon. _Chemical Symbol_: C. _Specific Gravity_: 3.50-3.55. _Properties_: Exhibits positive electricity when rubbed, but is itself a non-conductor of electricity. When intensely heated it burns, yielding Carbonic Anhydride. When heated so as to exclude chemical combination it dilates and forms into a black concretion. It displays phosphorescence under Radium, when submitted to strong sunlight and, when put in a vacuum tube, to a high tension electric current. Dr. G. F. Herbert Smith found that "some diamonds fluoresce in sunlight, turning milky, and a few emit light when rubbed." Dr. Kunz proved that diamonds phosphoresce when exposed to the rays of Radium, Polonium, or Actinium, even when glass is interposed. These phenomena formed special object of experiment with the late Sir William Crooks, who showed that exposed to high tension electric currents in greatly rarified atmosphere, the diamond phosphoresced with an intense green light. Prismatic colours are radiated by this gem. _In the Zodiac_: The Diamond is under the Heavenly Aries, Leo and Libra. _Where found_: India, Borneo, Brazil, South Africa, Siberia, Australia, United States of America. GARNET ALMANDINE, PYROPE, HESSONITE, (GARNET HYACINTH), UVAROVITE _Crystalline Form_: Isometric. _Hardness_: 6.5-7.5. _Lustre_: Vitreous. _Refraction_: Single. _Chemical Composition_: Silica Alumina, Red Iron Oxide, Lime Magnesia, Manganese, Protoxide. _Chemical Symbol_: Dr. Smith has the following formulae: Hessonite Ca_{3} Al_{2}(SiO_{4})_{3}. Pyrope Mg_{3} Al_{2}(SiO_{4})_{3}. Almandine Fe_{3}Al_{2}(SiO_{4}O)_{3}. Andradite Ca_{3}Fe_{2}(SiO_{4}O)_{3}. _Specific Gravity_: 3.4-4.3. _Properties_: Exhibits positive electricity by friction. With the exception of Uvarovite, all varieties of Garnets fuse before the blowpipe flame. The stone generally does not contain water. _In the Zodiac_: The Almandine is under the Heavenly Sagittarius; the Pyrope, Aquarius; Hessonite, Virgo; Uvarovite, Aquarius. _Where found_: Generally all over the world. OPAL