Jeweller - July 2022
Door wide open: Lab-grown diamonds have a unique chance to thrive The Ego Game: Personalised jewellery is as popular as ever seen Avoid the trap: The business world is full of cliches - it's time to move on
Door wide open: Lab-grown diamonds have a unique chance to thrive
The Ego Game: Personalised jewellery is as popular as ever seen
Avoid the trap: The business world is full of cliches - it's time to move on
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A QUARTERLY SPOTLIGHT ON COLOURED GEMSTONES JULY <strong>2022</strong><br />
COLOUR<br />
FOCUS<br />
THIS MONTH<br />
Australian<br />
Gemstones<br />
52 RED CARPET<br />
COLLECTION<br />
Who dazzled with this<br />
Bulgari necklace?<br />
Turn to page 52 to find out.<br />
Index<br />
COLOUR INVESTIGATION FEATURE<br />
Australiana<br />
<strong>Jeweller</strong> discovers the chemical and structural causes<br />
of colour in captivating natural Australian gemstones,<br />
from pink diamonds to sapphires.<br />
44<br />
45<br />
52<br />
IN DEPTH<br />
Dive into gem trivia<br />
COLOUR INVESTIGATION FEATURE<br />
Distinctive Australian gemstones<br />
RED CARPET COLLECTION<br />
This month’s colours dazzle<br />
Diamond<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
Diamond<br />
Greek adamas, meaning 'invincible'<br />
10<br />
2.417 - 2.419<br />
Irradiation, high pressure, heat<br />
Colorless, yellow, brown; rarely white,<br />
black, red, orange, gray, black<br />
QUICK PROFILE<br />
8 Popular<br />
Australian<br />
Gemstones<br />
Zircon<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
Zircon<br />
Persian zargun, meaning gold-hued<br />
7 to 7.5<br />
1.810 to 2.024<br />
Natural, heated<br />
Blue, red, yellow, orange, brown, green<br />
Sapphire<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
Topaz<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
Emerald<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
Corundum<br />
Greek sappheiros, meaning blue stone<br />
9<br />
1.76 - 1.78<br />
Heat<br />
Blue, green, and teal (among others)<br />
Topaz<br />
Greek Topazios, a small island in the<br />
Red Sea, now called Zabargad.<br />
8<br />
1.610 - 1.638<br />
Natural, layered, heated<br />
All colours<br />
Beryl<br />
Ancient Greek smaragdos, meaning<br />
green gemstone<br />
7.5 - 8<br />
1.56 - 1.58<br />
Oiling and other fracture filling<br />
Bluish green to green<br />
HONOURABLE<br />
MENTIONS<br />
• Ruby<br />
• Garnet<br />
• Chalcedony<br />
• Agate<br />
• Jade<br />
• Jasper<br />
• Prehnite<br />
Chrysophrase<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
White & Black Opal<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
South Sea Pearl<br />
VARIETY<br />
ETYMOLOGY<br />
HARDNESS<br />
REFRACTIVE INDEX<br />
TREATMENTS<br />
COLOURS<br />
Quartz<br />
Greek chrysos, meaning 'gold' prasinon<br />
meaning 'green'<br />
7-7.5<br />
1.530 to 1.540<br />
Natural<br />
Green<br />
Hydrated Silica<br />
Sanskrit upala ‘precious stone’<br />
5.0 to 6.6<br />
1.37-1.48<br />
Natural, colour boost, heat, resin, wax,<br />
oil<br />
All colours<br />
Calcium Carbonate<br />
Named for their pacific origin<br />
7<br />
2.5 - 4<br />
Bleached, Irradiation, Dyed, Coating<br />
Silvery-white and gold<br />
LEARN ABOUT THESE GEMSTONES IN DEPTH: JEWELLERMAGAZINE.COM
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