sapphire

Rounds dominate the gem market, but fancy gem cuts offer many beautiful options. Learn about the most popular fancy shapes, such as heart and emerald…

With only a few produced each year, pink diamonds are among the rarest gems on the planet. Learn how quality impacts cost for these rarities in our…

Some natural as well as synthetic gems have specific, characteristic inclusions. Learn the identifying inclusions of some of the most popular…

Hyper-Edge gem faceting laps will save you time and money. In particular, learn how the 1,500-grit lap compares with other types of laps.

Soft, violet-blue hues have made iolite a popular stone. Read about the quality factors for this trendy gem in our iolite buying guide.

All gem designs balance multiple factors that affect the stone’s appearance. Before tweaking a design, consider the overall goal for the finished…

Blue diamonds are among the rarest and most prized diamonds. Our blue diamond buying guide will help consumers understand the value factors for…

What constitutes a princess cut? Jeff Graham examines a variety of diamonds sold as examples of this design and identifies their overall characteristics.…

Fancy colored yellow diamonds are becoming increasingly popular. Our yellow diamond buying guide has the information you need before your next…