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        Learning Center

        Gem Buying Guides

        Melo Pearl Buying Guide

        Bright orange colors and flames that seem to dance across the surface make the melo pearl a fascinating gem choice. Learn how to find a quality specimen.…

        Watermelon Tourmaline Buying Guide

        Looking for a fun summertime gem? Watermelon tourmaline adds a pop of color that’s perfect for a playful summer look. Learn about the quality factors…

        Conch Pearl Buying Guide

        Considering a conch pearl buying trip to the Caribbean? Quality factors for these gems differ from colored gemstones. Before you make a purchase,…

        Chrysoprase Buying Guide

        With bright, apple-green hues, chrysoprase makes an attractive, eye-catching jewelry stone. If you’re looking for a top-quality gem, read…

        Ammolite Buying Guide

        With bright rainbow iridescence, ammolite is sure to draw attention. Read about this gem’s unique quality factors before your next ammolite…

        Iolite Buying Guide

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

        Paraíba Tourmaline Buying Guide

        Paraíba’s neon blue hues stunned the gem world in the 1980s. Read about the quality factors for this striking gem in our paraíba tourmaline…

        Citrine Buying Guide

        Citrine’s affordable autumn hues make it a great option for trendy jewelry. Read about the quality factors for this stylish gem in our citrine…

        Kunzite Buying Guide

        Rare and fragile, kunzite challenges lapidaries and delights jewelry aficionados. Our kunzite buying guide can help you add this gem to your collection.…

        Amber Buying Guide

        One of the earliest known gems, amber’s bright sunshine hues delight and enthrall. Learn more about this ancient gem’s qualities in our amber…

        Precious Coral Buying Guide

        Deep-water coral displays bright, rich reds and delicate pinks. Our precious coral buying guide will help you choose a gem for your next jewelry…

        Tourmaline Buying Guide

        Known for stunning, saturated hues, tourmaline is a colorful and modern gemstone. Read about quality factors for this gem in our tourmaline buying…

        Jade Buying Guide

        “The Stone of Heaven,” jade has an unmatched elegance. Learn more about the unique quality factors of both jadeite and nephrite in our jade…

        Zircon Buying Guide

        Long valued for its brilliance, zircon is a natural and affordable beauty. Learn more about the quality factors for this gem in our zircon buying…

        Agate Buying Guide

        Decorative, patterned forms of agate are excellent natural gems. Learn more about agate’s mesmerizing patterns in our agate buying guide.

        Garnet Buying Guide

        With so many colors and varieties available, garnet buying can be daunting. Whether starting your collection or completing it, our guide can help.…

        Turquoise Buying Guide

        Revered for millennia, sky blue turquoise still has a dedicated following. Our turquoise buying guide can help you pick a gem for your next jewelry…

        Pearl Buying Guide

        In this golden age of pearls, a wide variety of shapes, sizes, and colors are available. Our pearl buying guide can help you select a pearl you’ll…

        Morganite Buying Guide

        Morganite has become a popular jewelry stone, especially for engagement rings. Our morganite buying guide can help you pick a great gem for any…

        Amethyst Buying Guide

        Long valued for its purple color and symbolic associations, amethyst is a versatile gem. Our amethyst buying guide can help you pick an excellent…

        Lapis Lazuli Buying Guide

        Our lapis lazuli buying guide can help you learn how to grade these gems, what to avoid, and how to identify a high quality stone or a bargain in the…

        Emerald Buying Guide

        Our emerald buying guide can help you learn how these gems are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough.…

        Peridot Buying Guide

        Our peridot buying guide can help you learn how these gems are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough.…

        Sphalerite Buying Guide

        Our sphalerite buying guide can help you learn how these gems are graded, what to avoid, and how to identify a high quality stone or a bargain in the…

        Opal Buying Guide

        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.

        Topaz Buying Guide

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

        Ruby Buying Guide

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

        Rubellite Tourmaline Buying Guide

        Like all tourmaline gemstones, rubellite wears well in almost any type of jewelry. This stone’s raspberry-like color draws a great deal of attention.…

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