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It is found in various locations, but the most famous source for hessonite garnet is Sri Lanka. Jasper is a type of opaque chalcedony that is assigned its own gem group because it has a grainy structure that differs from typical chalcedony. The name " jasper " comes from the Greek for "spotted stone" with reference to its multicolored spots, stripes and other patterns. The variegated appearance of jasper is owed to the fact that it is composed of up to twenty percent foreign materials.
This means that each jasper gemstone is quite unique and there is an almost infinite variety of colors and patterns. Trade names for jasper incude "Zebra jasper"; which refers to dark-brown jasper with zebra-like bands. Kornerupine is a rare magnesium aluminum borosilicate gemstone named after Danish naturalist, artist and explorer, Nikolaus Korneup. Despite being known since , kornerupine remains a lesser-known gemstone.
Kornerupine gems may be brown, brownish-green, green, white, pink, yellow or blue and are also sometimes traded as "prismatine", in reference to their long, prismatic crystal structure. Pronounced pleochroism is an interesting property of kornerupine , which can display yellow, green and brown in a single gemstone, depending on the viewing angle. Mali garnet is a rare "hybrid" grossular garnet variety from Mali in West Africa that was discovered in , making it a relatively recent addition to the garnet gemstone group.
The colors of Mali garnet range from yellow to brown, with the most valued stones being green. Its remarkable dispersion and high refractive index give Mali garnet wonderful fire and brilliance, which is showcased by facet cuts. Mali garnet gems are transparent to opaque and have a Mohs hardness of 7. Obsidian is natural volcanic glass that forms as lava cools and can take various forms and colors, depending on the composition of the lava.
For example, "mahogany obsidian" has reddish-brown streaks running through it and "gold sheen", as the name suggests, has a golden, glittery sheen. In its pure form, obsidian has a dark body color, due to the presence of iron and magnesium. Obsidian is transparent to opaque with a vitreous luster and has been used as a gemstone for many years. Obsidian gemstones are often made into cabochons, carvings or cut into spheres. Pietersite is a rare dark-gray, midnight-blue, reddish or brown aggregate that is composed of mostly hawk's eye and tiger's eye crocodilite.
The crocodilite of pietersite appears as chatoyant light-reflecting swirls or streaks. When pietersite has more tiger's eye content, it results in a brown pietersite gemstone.
To showcase their chatoyancy, pietersite gemstones are cut as cabochons. Rutile quartz is transparent quartz that contains rutile titanium dioxide inclusions in the form of needles, which may be black, green, red or brown and make an internal landscape inside the gem.
When the rutile inclusions are dense, the color of the gemstone appears to take on the color of the inclusions. Thus, rutile quartz stones that contain dense, brown rutile inclusions look brown.
These intriguing but affordable gemstones are cut in many different shapes and styles. Sillimanite is made of the same polymorphic material as both andalusite and kyanite; aluminum silicate.
Though these three gemstones share the same composition, their crystal structures differ. Transparent sillimanite is rarely found, but is typically greenish to yellow in color, with the occasional light-blue or violet-brown stone.
Cat's eye sillimanite is usually brown, though it can also be violet. Sillimanite is the official state mineral of Delaware, though it was originally found in Connecticut. Sphalerite is composed of zinc ore and has very high dispersion, giving it incredible "fire", as well as fiery yellow, orange, red and brown colors. Its resinous to adamantine luster also adds to sphalerite's attraction. Since sphalerite lacks hardness, it is mainly a collector's stone.
Agate is a banded form of chalcedony quartz that occurs in many different colors and even geodes, which are rock cavities or vugs with internal crystal formations or concentric banding. Brown agate gemstones include fire agate, which is admired for its fiery iridescence; and dendritic agate; brown agate with black dendritic inclusions. Agate gems are extremely versatile and may be sold as beads, cabochons, faceted gems, agate geodes , carvings, slices or as tumbled stones.
Agate geode gems and slices are particularly popular for their "raw" look. Jewelry made from agate is hard and durable enough to last for centuries, with a pleasing waxy luster and translucent to opaque clarity. Dimensions are given as; length x width x depth , except for round stones which are; diameter x depth. Select gems by size, not by weight! Gem varieties vary in density, so carat weight is not a good indication of size.
Sign In. Change Language. Get Your Gemstone Today. Shop New Arrivals. Shop Sapphire. Shop Gemstone Lots. Calibrated Gemstones. Buy Gemstone Lots - By Piece. Shop Matched Pairs. Shop Cabochon Gems. Shop Drilled Gems, Briolettes and Beads.
Shop Birthstones. Shop Gemstone Carvings. Shop Fancy Gemstones. Shop Star Gemstones. Shop Unheated Sapphire. Brown Scapolite Gemstones Back to Top. Brown Tourmaline Gemstones Back to Top. All other gemstones are considered as being semi precious stones. These are old terms and not necessarily true these days. To view the treatments associated with each of these stones, visit our Technical Information On Gemstones page. Here you will find a list of gemstones that we sell on Gem Rock Auctions.
Click on any of the gemstones below to view the stones for sale by our verified sellers and learn more about it. Agate Amazonite Afghanite Alexandrite. Amber Amethyst Ammolite Ametrine. Apatite Aquamarine Andalusite Andesine Feldspar. Azurite Aventurine Bastnasite Azurite with Malachite. Calcite Bloodstone Carnelian Calligraphy Stone.
Chalcedony Chrome Diopside Charoite Cavansite. Citrine Coral Danburite. Diamonds Druzy Diaspore Dioptase. Fire Agate Fluorite Eudialyte Emerald. Garnet Hackmanite Fuchsite Heliodor.
Hematite Howlite Iolite Hiddenite. Jade Jasper Jeremejevite Ironstone. Kyanite Kunzite Labradorite Lapis Lazuli. Larimar Lepidolite Lava Rock Lazurite. Moonstone Moldavite Mystic Quartz Morganite. Onyx Obsidian Orthoclase Opalite. I'm sure any of these will standout with a contemporary, eye catching look! Want to learn more about jewelry? Check out these other helpful resources written by our jewelry experts! Most of these precious nature stones are very durable and are great for everyday wear.
In this article, you'll learn: What brown gemstones are Where to buy them And our top picks when it comes to popular brown gemstones. What's In This Guide? What Are Brown Gemstones? Brown Tourmaline. One good example is the brown diamond which is recently gaining tract with famous people. In essence, brown is a symbol of nature, health, and simplicity. To learn more about gemstones, here's a crash course on the most precious stones on Earth:.
Where To Buy Brown Gemstones? Brown Diamond. A bit affordable. Not quite popular. Fire Agate. Relatively affordable. Not faceted. It is a great stone having unique patterns across its surface. Easy to find Very affordable. Not commonly known. Brown Citrine.
However, most market specimens are actually heat-treated amethysts. Relatively cheap Great for statement jewelry. Heat treatment is common.
However, the stone is fiery and may have secondary undertones of pink or purple. Best for all jewelry. Best quality may be hard to find. Appealing brilliance. Smoky Quartz. Great for all jewelry Quite cheap. Not a common variety of quartz. Chocolate Opal. Relatively abundant. Low durability. Mahogany Obsidian. Unparalleled bohemian vibe Very cheap. Breaks easily.
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