Extra Lapis 15 (Ruby, saphire, corundum), Antiquarian

Only antiquarian available!!

Ruby, sapphire, corundum: beautiful, hard, rare, precious.

The most precious gemstone in the world. The mineral corundum is colorless in its pure form. Only the finest "impurities" turn a corundum into a precious gemstone: the element chromium colors corundum to red ruby, iron and titanium to blue sapphire. In the best qualities, more is paid for these two classic corundums than for any other gemstone in the world. The world's corundum localities. Where yesterday was no man's land, tomorrow may be a world-famous locality. The history of ruby and sapphire deposits is as changeful as luck itself. In this extraLapis issue, the current status is presented: Experts from all over the world describe the present situation in Asia, Africa, America, Australia and Europe in well-founded reports. Also in this issue: colors, properties and formation of corundum. The current syntheses: how they are formed and how to recognize them. The Mani Mala, a historical Indian gemstone book.

Contents:
The origin of corundum (D. Schwarz)/Mani Mala: an Indian gemstone book (S. Greif)/India, land of the great rubies? (Schwarz)/Sri Lanka, the first classic (D. Schwarz)/The "Sun of Mogok" (R. Schlüssel)/Mong Hsu, Myanmar (K. Schmetzer & A. Peretti)/Ruby mining in Thailand (K. Schmetzer)/Trapiche rubies from Southeast Asia (K. Schmetzer & H.- J. Bernhardt)/Vietnam, a trip to Luc Yen (P. Rustemeyer)/Kashmir, the new ruby find (R. E. Kane)/Pakistan, rubies from the Hunza Valley (A. Weerth)/Afghanistan, the current situation (A. Weerth)/Pamir/Tajikistan (D. Schwarz, C. P. Smith)/Laos: Ban Huai Sai (G. Bosshardt)/Nepal: Ganesh Himal (D. Schwarz)/Africa's corundums: Kenya and Tanzania (D. Schwarz & Ch. Bank)/Madagascar: corundums from north and south (D. Schwarz & J. Kanis)/USA, Montana: richly colored sapphires (R. E. Kane)/South America: Brazil and Colombia (D. Schwarz)/Australia's sapphire deposits (B. J. Neville & F. v. Gnielinski)/Europe: corundums for collecting (R. Hochleitner)/Synthetic rubies from Dourus (H. H. Hänni & K. Schmetzer)/New: Russian hydrothermal syntheses (K. Schmetzer)/Corundum in "Lapis"/Further reports on corundum.

With cover 100 pages in Lapis format 21x30 cm. Published: 1998