Gem identification is part detective work, part art. Learn how gemologists can distinguish gem species and determine whether a stone is natural or synthetic.
Satisfying the human desire for symmetry, trapiche gems have a special allure. Learn what makes these rarities so unique in our introductory article.
Our spinel buying guide can help you learn how spinels are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough.
Everything you ever wanted to know about spinel. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.
Considering buying gems in Afghanistan? Learn which Afghan gemstones to seek out, which to avoid, and prepare for a “buyer beware” experience.
Gemologists may immerse gems in refraction fluids during examinations. This refractive index list of household liquids offers some common alternatives.
What factors determine the light return of faceted gemstones? Facet quality, polish, color, and cut style all play roles. Learn more about these variables.
Many varieties of gems besides diamond can be created in the laboratory. Our synthetic gemstone guide covers many examples and explains their manufacture.