How much would a large and clean Verneuil Alexandrite cost?

Natural alexandrite is extremely rare, valuable, and collectable, however, some antique, estate and vintage jewellery sellers, as well as eBay (product), Amazon. read more

Synthetic alexandrite can be lab created by the flux method or the Czochralski pulling method which is similar to the "Verneuil" method. Of course synthetics cost money to produce but they are not a rarity and although they may cost $100 per carat on a retail level, they have no resale or investment value. read more

The stones are very clean and may be available in large sizes. Gemological testing will reveal a refractive index of 1.759 - 1.778 (corundum) instead of 1.741 - 1.760 (chrysoberyl). Under magnification, gas bubbles and curved stria may be evident. read more

The retail replacement cost for a 1ct. alexandrite could be anywhere between $500 to $12,000 per carat. The intensity of the color change and the attractiveness of the colors are the most important factors in determining the value of an alexandrite. read more