Rhombohedra Stepped rhombohedraFlattened rhombohedraStrongly trigonal habitsHexagonal plates“Roses“ScalenohedraSelective epitaxiesSheavesLenticular aggregatesBotryoidsSpherical aggregates“Stalactites“PseudomorphsFossils

For now I borrowed pictures of other collectors, but in the future I will add photos of my specimens too...Here is the list : name of zeolite and all localizations it was found:ANALCIME+Akureyri+Ulfarsfell, Mosfellsbaer+Nordurardalur+Road No. 1 roadcut, Heiđarvatn, Breiđdalsheidi, Suđur-MúlasyslaANALCIME, CHABAZITE+TrolladyngjaANALCIME+Sog river, TrolladyngjaCHABAZITE+Ulfarsfell, MosfellsbaerCHABAZITE with calcite+Nordurardalur+Reydarfj..

As gemologist for New York City’s prestigious Tiffany & Company, George F. Kunz took a considerable interest in the discovery of gem-bearing pegmatites in southern California in the 1890’s. In 1904, he authored an extensive study of gem materials produced in California, which was published by that State’s Mining Bureau. Kunz devoted considerable space to providing a summary history of the gem pegmatites, then provided notes on s..

Locality of the Moung Klung Gem Fields, ThailandSeveral regions in Thailand have historically produced gem-grade ruby and sapphire. The primary provinces are Chanthaburi and Trat, in the southeast of the country bordering Cambodia, and Kanchanaburi, on the west side of the country bordering Myanmar. Cumulatively the districts in these three provinces produce an estimated 90% of the nation’s gem corundum. Lesser quantities of gem corundum ar..

The Canary islands have not been well known for any minerals as I first visited Lanzarote in 1983, with the exception of Olivine xenolithes which are offered to the tourists on the road to El Golfo. At that time most of tourism took place at Puerto del Carmen. Playa Blanca at the south coast was a small village at the end of the paved road on the way to the Playa de Papagayo. There was a small hotel, a restaurant, a supermarket, the ferry harbour..

The “Book of Precious Stones” was written by Arabic scholar Mohammed Ben Mansur in the 13th Century AD. It was in no small way derived from a book written by another early Arabic mineralogist named Tëifaschi, which predated Mansur’s work by about 50 years.Mansur’s book was translated into German and published in 1818 by Joseph Freiherr von Hammer-Purgstall, an Austrian with a life-long interest in Asian studies. Soon ..

Inclusions in crystals provide valuable information to mineralogists, gemologists and geologists. In addition to offering vital data on the temperature and pressure at which the host crystal was formed, and serve as a chemical time capsule preserving a microscopic sample of the environment in which the crystal grew. Inclusions can provide a valuable clue to the identity of gemstones.Isaac Lea circa 1885Click for larger imageBetween 1869 and 1877,..

In 1908, Louis Pope Gratacap published one of the earliest articles on the techniques of mineral photography. Although somewhat simplistic by today‘s standards, it is interesting (and somewhat comforting)to note that Gratacap and other photographers fought against “burned out“ highlights on crystals surfaces.Gratacap had joined the staff of New York City‘s American Museum of Natural History as assistant curator of mineralogy in 1876, immediat..

First stop was theRogerley Mine- the UK‘s only commercially run mineral specimen mine which is operated by Cal Graeber and Jesse Fisher ofhttp://www.ukminingventures.com.[Link Broken? Jun 2012] They have been mining it since 1999 yet it has taken me ten years to drive the 5 hour journey up to the north of England to actually visit the mine operation.Let me make it clear right away. Rogerley is a working specimen mine. As such they don‘t normall..