GEMSTONES
Agate Alexandrite
Almandite Amethyst
Ammolite Andalusite
Apatite Aquamarine
Aventurine Bloodstone
Carnelian Chalcedony
Chrysoberyl Chrysoprase
Citrine Diamond
Emerald Feldspar
Garnet Hematite
Hessonite Iolite
Jade Kornerupine
Kunzite Malachite
Lapis Lazuli Labradorite
Moonstone Morganite
Onyx Opal
Paraiba Pearl
Peridot Quartz
Rainbow Obsidian Rhodochrosite
Rubellite Ruby
Sapphire Scapolite
Tanzanite Tiger’s Eye
Topaz Tourmaline
Turquoise Zircon
 
  EDUCATION AND GUIDANCE
  ANNIVERSARY CHART
  BIRTHSTONES
  CLEANING CARE
  DIAMOND GUIDE
  GEMSTONE ENHANCEMENTS
  METALS
  GLOSSARY
  RING SIZING GUIDE
  WEE COMPLIANCE
 
 
Here at TJC we know gemstones. And to help you make the right choices when buying gemstone jewellery, we’ve shared some of our knowledge. We’ve broken it down into easy-to-understand points, so you won’t feel like you’re back in school!
 
What is a gemstone?
It’s a mineral, rock, or petrified material that when cut/ faceted and polished is collectible or can be used in Jewellery. Others are organic – amber (fossilised tree resin); and jet (a form of coal).

How are they classified?
Gems are classified into different groups, species or varieties. Take the ruby. It’s the red variety of the species corundum, while any other colour of corundum is considered sapphire.

Emerald, aquamarine, bixbite, goshenite, heliodor and morganite, are all varieties of the mineral species beryl.