Gemstones Information and Price Guide - Art Deco Treasures https://www.artdecotreasures.com/gemstones/ Information and Price Guide to Art Deco Antiques Sun, 24 Jan 2021 09:38:14 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.3 Rose-cut https://www.artdecotreasures.com/rose-cut/ Sun, 24 Jan 2021 09:35:28 +0000 https://www.artdecotreasures.com/?p=566 Rose-cut diamonds are seldom seen nowadays, except in antique and Art Deco jewelry. There have been various forms of the rose cuts since the mid-16th century which have been derived…

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]]> Rose-cut diamonds are seldom seen nowadays, except in antique and Art Deco jewelry. There have been various forms of the rose cuts since the mid-16th century which have been derived from older types of cuts. The basic rose cut has a flat base and has a crown composed of triangular facets (usually 12 or 24) rising to form a point in an arrangement with sixfold rotational symmetry. The double rose cut is a variation that adds six kite facets at the margin of the base. The classic rose cut is circular in outline. Reference: Wikipedia

Below are some examples and price guides of Art Deco items with rose-cut gemstones including some scroll earclips and diagrams of the various single-cuts which can be found.

Rose-cut Diagram AN ART DECO YELLOW GOLD, BLACK LACQUER, DIAMOND AND MOTHER-OF-PEARL COMPACT CASE AN ART DECO ROCK CRYSTAL AND DIAMOND JABOT PIN, BY CARTIER, CIRCA 1920 ART DECO DIAMOND WRISTWATCH, CARTIER Art Deco Platinum, Aquamarine and Diamond Necklace, Cartier, London AN ART DECO DIAMOND BOW BROOCH designed as a ribbon

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]]> 566 Single-cut https://www.artdecotreasures.com/single-cut/ Fri, 22 Jan 2021 17:37:10 +0000 https://www.artdecotreasures.com/?p=520 Single-cut is the simplest cut used in gemstone cutting. It is most commonly used with small diamonds. This style of cut has changed over the centuries but usually has around…

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]]> Single-cut is the simplest cut used in gemstone cutting. It is most commonly used with small diamonds. This style of cut has changed over the centuries but usually has around 16 or 17 facets. Please see the diagram below.

Below are some examples and price guides of Art Deco items with single-cut gemstones including some scroll earclips and diagrams of the various single-cuts which can be found.

Diagrams of single-cut gemstones Art Deco Brooch with Single-cut Diamonds Diamond Earclips ART DECO DIAMOND BRACELET Art Deco Aquamarine Brooch

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]]> 520 Hardstone https://www.artdecotreasures.com/hardstone/ Sat, 16 Jan 2021 09:06:41 +0000 https://www.artdecotreasures.com/?p=487 Hardstone. Hardstones are precious or semi-precious gemstones which can be used for intaglios or mosaics etc. Reference: Lexico. During the Art Deco era hardstones were extremely popular in jewelry, vanity case,…

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]]> Hardstone. Hardstones are precious or semi-precious gemstones which can be used for intaglios or mosaics etc. Reference: Lexico.

During the Art Deco era hardstones were extremely popular in jewelry, vanity case, clock garnitures and many other forms of decorative arts. Hardstones are easy to carve and lent themselves well to being incorporated into artwork which made pictures, such as the Black, Starr & Frost timepiece below.

Below are some examples and price guides of Art Deco hardstone items including a diamond and multi-gem vanity case and a carved hardstone and diamond bracelet with carved flowers.

Art Deco Carved Hardstone and diamond bracelet, French, circa 1925 BLACK, STARR & FROST. A VERY FINE ART DECO CHINOISERIE 18K ENAMELED GOLD, CABOCHON TOURMALINE, AND CARVED HARDSTONE BOUDOIR TIMEPIECE ART DECO DIAMOND AND MULTI-GEM VANITY CASE French Art Deco Gold Mounted Agate, Hardstone and Coral Miniature Footed Bowl 14KT Art Deco Hardstone Bracelet Art Deco inlaid marble / hardstone mantle clock garniture

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]]> 487 Coral https://www.artdecotreasures.com/coral/ Thu, 14 Jan 2021 11:29:29 +0000 https://www.artdecotreasures.com/?p=476 Many forms of coral are now a protected species so care should always be taken to make sure that any item containing this gemstone is a genuine antique. The most…

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]]> Many forms of coral are now a protected species so care should always be taken to make sure that any item containing this gemstone is a genuine antique. The most desirable coral gemstone was precious coral aka red coral. The distinguishing characteristic of this gemstone is it’s durable and intensely colored red or pink-orange skeleton, which is used for making jewelry. Reference: Wikipedia

The gemstone was popular during the Art Deco era and was often combined with onyx to give bold displays which were fashionable at the time.

Below are some examples and price guides of Art Deco coral items including an a buckle by Cartier and a rare clock with a lapiz lazuli elephant on top.

Art Deco coral, onyx, diamond and enamel buckle, Cartier, Paris, circa 1925 A FINE AND RARE ART DECO LAPIS LAZULI, CORAL, CULTURED PEARL, AGATE AND DIAMOND DESK CLOCK, CIRCA 1925 ART DECO AGATE, CORAL AND ENAMEL SAINT CHRISTOPHER PLAQUE, CARTIER French Art Deco Gold Mounted Agate, Hardstone and Coral Miniature Footed Bowl ART-DECO ENAMEL, DIAMOND AND CORAL POWER COMPACT AN ART DECO DIAMOND, CORAL AND ONYX PENDANT, BOUCHERON

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