The GTC (The Gemstone Trading Company) is a colour gemstone wholesaler based in the Sydney CBD. Read more »

Harmony Gems is a fourth-generation gemstone dealer with deep roots in the global gemstone trade. Read more »

From O'Neils Affiliated, a lovely alexandrite that is loupe clean with good colour change from mid-green to purplish pink — a delightfully beautiful gemstone in a desirable shape and size. Read more »

Harmony Gems is a fourth-generation gemstone trading company with a rich legacy in the gemstone and jewellery industry. Read more »

The Gemstone Trading Company is a highly regarded and trusted colour gemstone wholesaler based in Sydney. Read more »

Emerald by day and ruby by night, alexandrite is perhaps the best example of the magical colour-changing variety of gemstones. STACEY LIM reports. Read more »