Jewel__A_Celebration_of_Earth_s_Treasures
OPAL 159 Opal △ Ethiopian opal displaying a light-base, full spectrum play-of-colour O pal falls into two categories: precious a ...
160 SILICATES Faceted opal | Some fire opal (sometimes called “jelly” opal) is transparent enough to facet. This orange brillian ...
OPAL 161 Settings Opal and garnet ring | Based around a 4.18-carat opal cabochon, this intricate ring is also set with various g ...
162 HALLEY’S COMET OPAL Halley’s Comet opal | Discovered 1986 | 1,982.5 carats 162-163_STO_Halleys_Comet_Opal.indd 162 18/05/201 ...
HALLEY’S COMET OPAL 163 A ccording to Guinness World Records, this impressive rock, which is roughly the size of a man’s clenche ...
Moonstone M oonstone, an opalescent variety of anorthoclase and other feldspars, has been used in jewellery for centuries. Ancie ...
Settings Hair combs | Made by Ella Naper around 1906 in the British Arts and Crafts style, these lily-pad hair combs are made of ...
166 SHIMMERING COLOUR Shimmering colour P lay of colour is caused by the interference of light interacting with a gemstone. Depe ...
SHIMMERING COLOUR 167 Shimmering colour Moonstone Moonstone displays an effect called adularescence, caused by the unusual, laye ...
S unstone is a gem that takes its name from its appearance, rather than as a result of the specific mineral it is made from. All ...
A type of feldspar, labradorite is named for the Canadian province of Labrador, where it was first identified in 1770. Gemstone ...
170 SILICATES T he pink crystals of orthoclase give common granite its characteristic pink colour. It is also an important rock- ...
ORTHOCLASE–MICROCLINE 171 M icrocline is one of the most common potassium aluminosilicate feldspar minerals; the other is orthoc ...
172 SILICATES A lbite is mainly significant as a rock-forming mineral, but it also has some use as a gemstone. It is found as we ...
ALBITE–BYTOWNITE 173 B ytownite is the rarest member of the plagioclase feldspar group; the other members of the group that have ...
174 SILICATES David Webb lion bracelet | This crossover bracelet in the form of a lion, made of gold inset with carved lapulis l ...
LAPIS LAZULI 175 Lapis lazuli △ Piece of fine, rich blue lapis lazuli rough Key pieces Ancient Egyptian gold pectoral | Featurin ...
176 SILICATES Copper antlers Ancient eagle | Originating from the Sumerian civilization around 2650 BCE, this lion-headed eagle ...
177 Cufflinks | This pair of gold and lapis cufflinks was produced by the House of Bulgari. The inset lapis lazuli material is f ...
178 JEWELS OF ANCIENT EGYPT Jewels of ancient Egypt W hen archaeologist Howard Carter opened the solid gold coffin of Tutankhamu ...
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