Enstatite is delicate but has a very high melting point. It’s commonly brown or yellow-green but can be transparent or even gold if it contains iron deposits. EnstatiteĮnstatite is a soft stone rarely found in gemstone quality. While it comes in many colors, a common variety is a brown-green or copper that looks red-orange or rose under incandescent lighting. Color Change GarnetĬolor change garnet is a rare form of garnet produced from a mixture of spessartite and pyrope. These delicate stones are untraditional, but their beauty lies in their unique appearance and the flashes of color they offer. Chocolate OpalĬhocolate opal is a stone that, while appearing an opaque brown, also reflects the entire light spectrum. Jewelers always use an en cabochon cut to best showcase this unique feature. The more obvious it is, the more expensive it will be. Brown is the most common color for a cat’s eye apatite, but the real value lies in how bold the chatoyancy is. Cat’s Eye ApatiteĬat’s eye apatite is a soft gemstone that exhibits a chatoyancy, or cat’s eye, effect. Like andalusite, tourmaline has pleochroism and, as such, can appear to hold many different colors when viewed from different angles. More transparent varieties have a dark yellow color. Brown Tourmalineīrown tourmaline has deep red and chocolate tones in opaque varieties. Still, it can look just as stunning in square or rectangular cuts. It is usually cut in a teardrop, oval, or round shape to enhance its fiery reflections. It is currently unclear how this will affect the production of brown diamond jewelry.īrown topaz is a lovely hard stone that most often boasts a light yellow or honey color. Almost 80% of the diamonds mined in Australia’s Argyle mine were brown.īefore closing in 2020, the Argyle Diamond Mine was one of the most productive diamond mines in the world. As 15% of all diamonds mined are brown, they are usually easy to find and inexpensive. Brown Diamondīrown diamonds are among the most affordable varieties of diamonds. Natural stones are also much lighter and more transparent than synthetic brown citrine. Natural brown citrine is yellow or yellow-orange, while synthetic stones have a red-brown or red-orange tone. This process can occur naturally or through heat-treating. It forms when purple amethyst or smoky quartz is heated. Brown CitrineĬitrine is the second most popular quartz gem after amethyst. It is generally transparent and comes in blue, brown, and violet varieties.Īxinite has rare pyroelectric and piezoelectric characteristics, meaning it can generate an electric current under extreme heat, cold, or pressure. Axinite is a rare stone with beautiful clarity and a vitreous luster.
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