The hardness of gem materials is an important measurement we can easily understand through the Mohs Hardness Scale. Austrian geologist and mineralogist, Friedrich Mohs, created this standard comparison of the hardness of one gem material against another 200 years ago.
Gemologist and author, Renee Newman unveils the rare and mesmerizing gem, Fire Agate.
Learn and compare moissanite and diamond, two beloved gemstones that often compete for the same admiring glances.
All About Sapphire: September’s Birthstone
Learn all about sapphire, the birthstone for September, including the meaning, properties, history and varieties of this gemstone.
All About September's Sapphire
Adventure into the science behind the various colors of sapphire.
Gemstone collecting has a history dating back to the travels of Marco Polo. Discover the tales that led to the popular past time of collecting gemstones.
Gemstone Weight vs. Gemstone Size
Discover the difference between gemstone weight and gemstone size.
Phenomenal Gemstones and Optical Properties
Phenomenal gemstones exhibit unique and stunning optical characteristics like cat's-eyes, color change and more.