Two different minerals are known as jade: jadeite and nephrite. Stones with imperfections are usually carved. Translucent jade is more highly valued than opaque jade. Edwardian 18ct Gold, Diamond & Large Oval Garnet Ring Cabochon Garnet & Rose Diamond Drop Earrings Victorian Cabochon Garnet & Rose Diamond Brooch JadeĪ semi-precious stone that ranges in colour. In descriptions, ‘garnet’ tends to refer to dark red stones unless otherwise specified. Garnets come in a variety of colours, including green, however the most common colour is dark red. Art Deco 18ct Gold & Platinum, Emerald & Diamond Cluster Ring Art Deco 18ct White Gold, Emerald & Diamond Step Cut Ring Large 18ct Gold, Emerald & Diamond Rectangular Ring Garnetĭescribes a group of several closely related minerals. Emeralds were long thought to have healing powers, especially for eyesight. Emeralds belong to the beryl group of stones, which form as large, six-sided crystals. Synthetic emeralds have fewer imperfections and are hard to set apart from natural stones. Flaws and cloudiness (‘jardin’) are very common in emeralds, so stones are often oiled and dyed to improve their look. An intense, deep green is the most desirable colour for emeralds. Large Art Deco Platinum & Diamond Rectangular Brooch Edwardian Platinum & Diamond Festoon Necklace Art Deco Platinum Three Stone Diamond Ring Emerald

The cut, colour, clarity and carat weight of a diamond are the criteria jewellers use to discern a stone’s value. Natural coloured (or ‘fancy’) diamonds can be extremely rare. Colours of diamonds range from colourless, yellow, orange and brown to almost black. Diamonds are one of the hardest materials known to mankind. Regency 18ct Gold, Coral & Turquoise Cluster Ring Georgian 23 Strand Coral Necklace with 18ct Gold Clasp Victorian 9ct Gold Coral & Natural Split Pearl Marquise Ring DiamondĪ precious, lustrous gemstone made of highly compressed carbon. Coral is believed to be one of the oldest forms of gemstone jewellery, with some pieces dating back as far as 23,000 BC. It grows in branches that look like underwater trees. Victorian Gold & Citrine Drop Earrings Art Deco 18ct Gold & Platinum, Citrine & Diamond Ring Edwardian 15ct Gold Fringe Necklace set with Citrines & Rock Crystal CoralĪn organic gem, consisting mostly of calcium carbonate, deposited by tiny sea creatures called polyps living in the depths of warm seas in huge colonies.

The best quality citrine is found in Brazil. Edwardian Alexandrite Tie Pin Edwardian 18ct Gold & Platinum, Natural Colour Change Alexandrite & Diamond Cluster Ring Edwardian 15ct Gold, Cats Eye Chrysoberyl & Diamond Tie Pin CitrineĬitrine (from the French for ‘lemon’) is a rare, yellow type of quartz, a semi-precious stone that ranges in colour from pale yellow to orange to golden brown. Alexandrite and cat’s eye are both notable types of chrysoberyl. Regency 18ct Gold Diamond & Chrysoprase Drop Earrings Green Crysoprase 14ct Gold Art Deco Bracelet Art Deco Chrysoprase & Rock Crystal 9ct Necklace ChrysoberylĪ hard stone that ranges in colour from yellow to brown to green. The unique, rich colour of chrysoprase derives from its origins, in nickel-rich areas. Ranges from a light, minty-green to a deep apple-green and is a green version of chalcedony.

9ct Gold & Blue Chalcedony Round Earrings Art Deco Silver & Blue & Green Chalcedony Necklace Art Deco Chalcedony & Rock Crystal Sûreté Pin Chrysoprase Victorian 18ct Gold Signet Ring set with a Carnelian Art Deco Silver, Carnelian & Marcasite Necklace Early 20th Century Gold & Carnelian Signet Ring ChalcedonyĪ family of minerals that is often milky to grey to bluish in colour. Carnelian once held greater value than it does today. It is often a solid colour, but banded examples also occur, in which case it is jointly classified as both agate and carnelian. The red, orange, or amber variety of Chalcedony.

9ct Gold & Oval Bloodstone Signet Ring 19th Century Signet Ring set with a Bloodstone Intaglio with Grapes Carnelian Spots are favoured over larger stripes and markings. The extent of the marking varies depending on the stone. A dark green variety of chalcedony that is splattered with reddish-brown spots that resemble blood.

Black ring with blue and pink gems