However, ammonite, strictly speaking, refers to the fossil shells of ammonites, whether gem-quality or not. You may find the terms ammolite and ammonite sometimes used interchangeably. What's the Difference Between Ammolite and Ammonite? Jewelry and photo by Korite International. In Siksika, the language of the native Blackfoot people, the stone is called aapoak, meaning "small, crawling stone." Ammolite triplet pendants and earrings. is the largest commercial supplier of this gemstone. The mining company Korite International Ltd. It was only recognized as an organic gemstone in 1981 by the Coloured Stones Commission of the World Jewellery Confederation (CIBJO).Īmmolite is also known as calcentine and by the trade name Korite. CommentsĪmmolite was first used for commercial jewelry in the 1960s. Mary River Valley, southern Alberta, southwestern Canada. Photo courtesy of and Collectors Liquidation.Īmmolite from Placenticeras fossil ammonite, found in the Bearpaw Formation, St. Gem Gradeįor more information on ammolite quality factors consult the IGS buying guide. However, most systems refer to color, brightness, iridescence, etc. The ammolite industry has yet to agree on any one grading system. This structure allows the ammolite to show the most brilliant flash while protecting it in a setting durable enough for everyday jewelry wear. On top, there’s usually a calibrated cap of optical quartz or synthetic spinel (3). Ammolite triplets are usually constructed on a dark gray wafer of natural shale (1) below a thin layer of ammolite (2). Gem cutters can also create ammolite doublets or triplets. Doublets are freeform cabs bonded to a backing. These are priced by carat weight, but the backing thickness shouldn’t exceed 1.5 mm. They’re backed by the original shale of the fossil and can range in size up to 10 carats and 6 inches across. Ammolite “naturals” are freeform cabochons with a non-coated hand finish.
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