enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Opal - Wikipedia

   en.wikipedia.org/wiki/Opal

   Triplet opals tend to have a more artificial appearance and are not classed as precious gemstones, but rather "composite" gemstones. Jewelry applications of precious opal can be somewhat limited by opal's sensitivity to heat due primarily to its relatively high water content and predisposition to scratching. [ 12 ]

3. Ammolite - Wikipedia

   en.wikipedia.org/wiki/Ammolite

   Ammolite is an opal-like organic gemstone found primarily along the eastern slopes of the Rocky Mountains of North America.It is commonly unearthed by natural erosion or through the process of various mining practices, within the perimeter of an ancient sea bed called the Western Interior Seaway. [2]

4. Doublet (lapidary) - Wikipedia

   en.wikipedia.org/wiki/Doublet_(lapidary)

   Opal Doublet. A garnet and glass doublet uses a top portion of natural garnet fused to any color of glass to imitate a gem. The color of glass used in the doublet is all that is seen, as the garnet provides no color. If seen in reflected light, a separation line may be seen. A harder garnet makes the stones more durable.

5. List of individual gemstones - Wikipedia

   en.wikipedia.org/wiki/List_of_individual_gemstones

   Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal; Flame Queen Opal; Galaxy Opal; Halley's Comet Opal, the world's largest uncut black opal; Olympic Australis Opal, reported to be the largest and most valuable gem opal ever found

6. Slocum stone - Wikipedia

   en.wikipedia.org/wiki/Slocum_stone

   Slocum stone (sometimes sold as "Slocum opal") is an early opal simulant which was briefly popular prior to the introduction of synthetics and less expensive simulants. [1] It was named after its inventor, John L. Slocum (1920–1998) [2] of Rochester, Michigan. [3] John Slocum experimented during the 1960s with various methods.

7. Chrysoberyl - Wikipedia

   en.wikipedia.org/wiki/Chrysoberyl

   Despite the similarity of their names, chrysoberyl and beryl are two completely different gemstones, although they both contain beryllium. Chrysoberyl is the third-hardest frequently encountered natural gemstone and lies at 8.5 on the Mohs scale of mineral hardness , between corundum (9) and topaz (8).