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Gemstones

Learn about Sapphires, Rubies, Emeralds, Pearls and more. Precious and semi-precious gemstones come in every color imaginable, and they add interest and excitement to any piece of jewelry.

23 articles in this category :: back to FJU home

  1. Collection of loose and mounted quartz gems of various types

    Gem in the Spotlight: Quartz

    Quartz is one of the most abundant minerals on earth, and yet it can also be one of the most valuable. Many quartz gems are common and affordable, while some varieties are very rare. Some are Plain Jane like rock quartz, others are exotic like Drusy Quartz. Some quartz material is a dollar per pound others are $1,000 per carat. Quartz is a gemstone with surprising variety... read more »

  2. Group of loose topaz gems and topaz jewelry

    Gem in the Spotlight: Topaz

    Topaz is a gemstone with amazing variety. Topaz is naturally colorless and clear like a diamond, but it can also take on an entire range of colors. Yellow to reddish-orange is known as Precious Topaz or Imperial Topaz. Imperial Topaz is one of the expensive varieties of Topaz. Gem suppliers can even bombard Topaz in a nuclear reactor to produce various shades of Blue Topaz. Topaz is the birthstone for November, and they make great gifts for anyone born in November, or for anyone that just likes beautiful jewelry... read more »

  3. Blue Zircon loose gems and jewelry

    Gem in the Spotlight: Blue Zircon

    Zircon may be last in the alphabet of gemstones, but it is first in sparkle. The crystal structure of zircon creates one of the liveliest displays found in any colored gem. In fact, before any of the manmade diamond simulates were made, the colorless version of zircon was used in jewelry to mimic diamond. Why? Natural zircon is known for its scintillation, brilliance, and flashes of color or fire just like diamond. Zircon also is known for its variety of colors. Blue zircon is the most popular color. But, zircon... read more »

  4. Polarized light diagram

    The Magic of Polarized Light

    In this article we do a deep-dive on polarized light and how it is used in gemology. You'll learn what polarized light is and how it's used in our daily lives. You'll also see lots of great, visual examples of polarized light in action as it is used to help identify gemstones in our lab... read more »

  5. Synthetic Gems: The Whole Story

    Synthetic rubies, emeralds, sapphires, diamonds and more are everywhere. Man made gems come in many forms: every thing from simple glass to high tech chemical tongue twister like gadolinium gallium garnet (also called GGG) and the modern diamond simulant moissanite. Synthetic gems are not bad, fakes, or the curse of a modern society. The more you know about them, the better you can understand their place in our society and in the jewelry world... read more »