A spectacular vibrant fresh green grass color Colombian Muzo emerald weighing a stunning 6.28 carats is the lustrous star of this classic Art Deco ring.
Made by Auguste Dufour, supplier to the Belgian court, somewhere in mid-nineteenth century for what we think must have been a princess or at least someone of the old aristocracy. When draped around the neck it looks like precious lace.
An exceptional example of the Portuguese bow-knot pendant in a quality we are proud of to present. The exquisite design, excellently executed by highly skilled jewellers is a true joy for the eye. This type of jewel is called a laça bow-knot. The abundantly used diamonds and heavy gold metal work can make us only wonder what high class noble lady this jewel belonged to.
This romantic You & Me ring, Circa 1870s in Victorian style, is made of 18 high Carat rose/red gold. The ring is set with a beautiful warm green color old mine emerald of Colombian origin with a weight of 0.51 carat (see the pictures for the International Gemological Institute certificate) and one rose cut diamond. The rose cut is set on foil. This is a special technique that was used to bring the lustre of the diamonds to its best quality. Romantic sellers would say that this is done so that the stones will sparkle beautifully in candlelight. The ring weighs 2.80 Grams and the finger US size is 8. It is our pleasure to resize the ring for you at our expense. From our expertise, this ring is in excellent condition and fine quality. Delivered with its authenticity certificate.
Since the middle ages, this elegant Lady City built a strong reputation in the diamond trade giving birth to famous jewelers and fashion designers. Through generations, couples with taste turn to Antwerp to purchase fine pieces of jewelry. And also in a habit that passed on from mother to daughter, people come to the Antwerp experts to sell their jewelry. Many of these pieces find their way back in the stunning collection of antique and estate jewelry, a source of incredible and …
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A variety of paste made of very fine lead glass, ground, fused, cooled and polished, and used to imitate colourless gemstones, especially the diamond.
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A synthetic gemstone that resembles the natural diamond, produced at very high temperature and under great pressure. The earliest experiments were made before 1880 by a Glasgow chemist, J.B. Hannay, who produced some small stones of doubtful authenticity. Experiments by F.F.H. Moissan in the 1890s and by others later proved inconclusive. In 1955 a successful process was developed using techniques devised by Dr Percy W. Bridgman (1882-1961) for the General Electric Co. in the United States, producing by high temperature and enormous pressure some very small stones (1,2mm in length). As a result, this firm and others in Sweden and elsewhere now produce quantities of small synthetic diamonds for industrial use, but they are not large enough for gemstones and are more costly than natural stones.
By 1970 General Electric Co. had produced gem-quality synthetic diamonds that were colourless or that showed yellow or blue, but they show technical deviations from the natural stones and under a microscope have a ‘dusty’ internal look. Some man-made stones are sold as simulants of diamonds but are not synthetic diamonds, e.g. cubic zirconia; yttrium-aluminium-garnet, and strontium titanate.