inclusions

Clinohumites and chondrodites can make beautiful gemstones with rich colors, but these members of the humite mineral group are rare and little…

Fancy cut diamonds can have any finished shape, except round. These stones have their own grading criteria, in particular regarding proportion…

Traditional diamond cut grading methods prepare gemologists for making evaluations with minimal time, tools, and references. This step-by-step…

Our opal buying guide can help you learn how opals are graded, what to avoid, and how to identify a high-quality stone or a bargain in the rough.

Here are the top 5 facts about diamonds you need to know: (1) the supply of blood diamonds has decreased; (2) diamonds can break; (3) a diamond’s cut…

You can probably find a topaz engagement ring stone in your favorite color at a reasonable price. Learn what to look for and how to care for your gem.…

Red gemstones are popular choices for engagement rings and fine jewelry. The three most popular stones are ruby, garnet, and red spinel. However,…

Just starting your engagement ring search? Our guide explores the most popular gemstone shapes to help you find the best one.

Heart cut diamond rings are becoming more popular as engagement ring stones. Learn about quality, clarity, color and cost.