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Search Results - Susan Hartwig

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Image from L to R: Raw synthetic moissanite material before being grown. Source: Alibaba | Cut and set moissanite Source: Diamond Boutique

Gemstones
Synthetic Moissanite

Synthetic moissanite is marketed by the jewellery industry as an affordable diamond alternative. Named after Nobel Prize winner and French chemist Henri Moissan, moissanite in its natural form is a rare mineral, silicon carbide. Read more »

Gemstones
Chrysoprase

Chrysoprase is the green variant, and most valuable form, of chalcedony. Its name comes to us from the Greek language, with chrysos being the word for gold and prasinon for green. Read more »
L to R: Blue sapphire with asterism; yellow topaz with chatoyancy against background of assorted gemstones.

Gemstones
A guide to asterism and chatoyancy

The beauty of gemstones resides in the optical properties associated with light, be it light reflected within the body of the gem or from the gem’s surface. Read more »
Garnet gemstone

Gemstones
Garnet: Gem of many colours - Part II

In part two of the Garnet: Gem of Many Colours series, key members of the garnet family will be discussed, together with garnet history – in the jewellery sense – and garnet lore. Read more »
Garnet gemstone

Gemstones
Garnet – Gem of many colours: Part I

Long an indicator of wealth and status, deep red garnet was coveted by monarchs and nobles across many ancient cultures. The Romans used carved garnets in seals to mark their official documents, the ancient Britons decorated their weapons with the gems, and Egyptian pharaohs were buried with strings of garnets. Read more »

Gemstones
Organic Gems Part VI: Coral

Coral has a long history of use in jewellery. Many cultures across the world have valued coral for adornment, and also for its reputed mystical features. As well as being prized for jewellery, red coral was valued as a charm to ward off evil and to increase fertility. It was held to protect against snakebite and reduce fevers. Read more »

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