Gemstones - Agate
Gemstones - Agate Agate is one of the best-known varieties of chalcedony. It is characterized by colorful patterns, bands, clouds, or mineral inclusions. The gemstone forms when silica-rich solutions deposit layers within cavities of volcanic or sediment
Gemstones - African Emerald
Gemstones - African Emerald African emerald is a term that has been used in more than one way throughout gemological history. In some cases, it has referred misleadingly to green fluorite or green tourmaline. In other instances, it has been applied to ge
Gemstones - Adinol
Gemstones - Adinol Adinol is a silicified variety of porphyry or diabase. It is mentioned in certain mineralogical and gemological references. The material forms when silica-rich solutions alter the original rock. This process increases the rock’s silica
Gemstones - Adularescence
Gemstones - Adularescence Adularescence is a unique optical phenomenon seen in certain gemstones. It appears as a soft, floating glow that moves beneath the surface of the stone. The effect is most commonly associated with precious moonstone. A delicate
Gemstones - Adularia
Gemstones - Adularia Adularia is a transparent to translucent gem variety of orthoclase feldspar. It is typically colorless to milky in appearance. The material is especially famous for displaying adularescence. Because of this optical effect, it is ofte
Gemstones - Adularia Moonstone
Gemstones - Adularia Moonstone Adularia moonstone is another name for precious moonstone. It refers specifically to gem-quality adularia displaying a distinct adularescent sheen. The gemstone is admired for its soft and luminous appearance. Its beauty ha
Gemstones - Aeroides
Gemstones - Aeroides Aeroides is an American trade name for pale sky-blue aquamarine. The name emphasizes the gemstone’s light and airy coloration. Aquamarine is a blue variety of the mineral beryl. Its color ranges from very pale blue to deeper ocean-li
Gemstones - Afghanistan Lapis
Gemstones - Afghanistan Lapis Afghanistan lapis refers to exceptionally fine-quality lapis lazuli from the Badakhshan region of Afghanistan. This area has been one of the world’s most important lapis sources for thousands of years. The gemstone is renown
Gemstones - African Nephrite
Gemstones - African Nephrite African nephrite is another name for Transvaal nephrite. It refers to nephrite jade originating from southern Africa. Nephrite is one of the two minerals recognized as true jade. It has been valued for centuries because of it
Gemstones - African Jade
Gemstones - African Jade African jade is a trade name for green grossular garnet. The material has also been known as Transvaal jade. Despite its name, it is not true jade. The designation arose because of its green color and somewhat similar appearance.