synthetic chrysoberyl

LOT 244 – CHRYSOBERYL AND DIAMOND RING – with a pre-sale estimate of GBP 6,000 – 8,000 (USD 7,952 – 10,602) is top among the Chrysoberyl Lots. Size O1/2 14k yellow gold and platinum ring, Stamped 14K-PLAT on the inside of the shank, is collet-set with a cushion-shaped chrysoberyl within a ...

On 4 February 2016, a 404.20 carat rough diamond was mined in eastern Angola. It would turn out to be the 27th-largest rough white diamond ever discovered, and the largest ever found in Angola. Early spectrographic testing at the Gemological Institute of America (GIA) in New York declared the stone to be a D-colour, ...

Significant Demi-parure in the collection include Lot 289 – THE CHRYSOBERYL DEMI-PARURE – with a pre-sale estimate of GBP 4,000 – 6,000 (USD 5,287 – 7,930). The demi-parure of 18th-century design consists of a Devant-de-Corsage and a pair of Pendant Earrings. The Devant-de-Corsage of ...

Lot 3 is an antique piece from the 2nd-half of 19th-century, titled DIAMOND AND CAT'S EYE CHRYSOBERYL PENDANT NECKLACE, SECOND HALF 19TH CENTURY, with a pre-sale estimate of GBP 26,000 – 36,000 (USD 34,406 – 47,639). The 32 cm (12.6 ins) Collar length necklace, is designed as a ...

The AGTA Spectrum Awards™, an annual natural colored gemstone & cultured pearl jewelry design competition launched in 1984, is considered the most respected and prestigious creative award for the jewelry design industry, honoring, recognizing and promoting designers, whose work utilizes natural ...

Pirom Gem Trading supplies coloured natural and synthetic gemstones. ... Truth: Alexandrite chrysoberyl and other colour-change gemstones like natural colour-change sapphire, natural colour-change garnet and natural colour-change diaspore can all have beautiful colour changes when moving the ...

Alexandrite, a variety of the gemstone chrysoberyl, is a fine example of this magical effect, with superior quality material producing a dramatic colour change that is sometimes described as emerald by day and ruby by night. This is not surprising as the 'magician' behind the scenes in this extraordinary ...

Lot 1750 is a cat's eye chrysoberyl lot, given the title “Cat's Eye Chrysoberyl and Diamond Ring,” with a pre-sale estimate of HKD 390,000 – 500,000 (USD 50,263 – 64,440). The size 6, platinum ring is prong-set with an oval, medium yellowish-green, cabochon-cut cat's eye chrysoberyl of good color ...

Forget emeralds, rubies and sapphires. According to the song “Diamonds may be a girl's best friend”, but if you really want to impress, how about the beautiful blue of Larimar, said to have healing properties and often called the Atlantis Stone. Found only in a one square kilometre area of a remote ...

Alexandrite belongs to the chrysoberyl family, a mineral called beryllium aluminum oxide in chemistry jargon, that contains the elements beryllium, aluminum ... Synthetic alexandrite, resembling a reddish-hued amethyst with a tinge of green, has been manufactured but the color change seen from natural to ...