British auction house Woolley & Wallis has denied media reports that it’s about to sell the world’s largest natural pearl—but notes that the specimen it’s selling is still pretty impressive, and likely to fetch more than $400,000.
Because gemstones form under unique circumstances, each individual gemstone is comprised of a combination of trace minerals, which create a unique set of identifying marks or inclusions.
Colored gemstones are generally cut to maximize the beauty of their color. To recognize quality in the cut of a gemstone, there are several points to consider.
The carat weight of a gemstone does not necessarily allow you to accurately envision the size of the gemstone. Different gemstones have different densities (mass per unit volume), so two gems that appear to be the same size may
