Loose Lab Alexandrite Emerald 6x4mm Colour Change

High-quality synthetic gemstone • Ships Worldwide from the UK

Lab Alexandrite, Created Alexandrite, Emerald, 6x4mm (0.55ct)

Total incl. shipping: £15.28

0 pieces in stock

💎 Secure checkout • 🚚 Ships from the UK • 🔁 14-day returns

Next shipping date: Friday, January 2nd at 16:00

Why Buy from DiamondCZ?

1. Cubic Zirconia is the best diamond simulant

Despite the hype around moissanite, Cubic Zirconia remains the most realistic diamond simulant to the naked eye. Its refractive index and dispersion are closer to diamond in appearance, resulting in a more natural sparkle. Moissanite, while often marketed as a superior alternative, sparkles too intensely and shows rainbow flashes that give it away.

	Diamond	Cubic Zirconia (Closer Match)	Moissanite
Refractive Index	~2.42	~2.15 – 2.18	~2.65 – 2.69
Dispersion (Fire)	0.044	0.060	0.104

2. Quality You Can Trust

Cubic zirconia is often misrepresented. Sellers may label 1A as 3A, or send a few good 6A samples but deliver lower-quality stones in the final order. Others mix poor-quality stones in larger packs without disclosing it.

3. 20 Years of Sourcing Gemstones

DiamondCZ has partnered with expert gem cutters for over 20 years to deliver true 6A, 5A, and 3A stones. With low overheads you’re paying mostly for the gemstone.

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Category Description:

This Emerald Alexandrite is cut from different material than the others. It is made to look more like Russian Alexandrite. Russian Alexandrite is the most valued and rarest alexandrite because of the redish purple colour change. These lab created Alexandrites are chemically identical to natural Alexandrites (beryllium oxide). The colour changes significantly from green in the sunlight to purple in candle light. Because of the depth and transparency of the stones, the larger stones change colour better than the smaller ones. For example, the smaller 6mm stones can still look green in artificial light at certain angles, but the large 9x7mm Pear is clearly green in the sunlight and 100% purple in artificial light. These are not simulated Alexandrites, these are true Lab Created Alexandrite stones. Often simulated stones are wrongfully sold as lab created, but these are true lab created stones and guaranteed to match the chemical and physical properties of a natural Alexandrite. All the alexandrite stones below are internally flawless.