Obsidian, Black Meaning and Properties

Black Obsidian History


Obsidian, a naturally occurring volcanic glass, has been used as a gemstone since antiquity. Formed when lava rich in feldspar and quartz cools too rapidly for crystals to form, obsidian is not classified as a true mineral. This is because its composition is too variable and, as a glass, it lacks a crystalline structure, distinguishing it from other igneous rocks.


Obsidian, named after the Ancient Roman explorer Obsidius, who discovered it in Ethiopia, has been prized for both its beauty and utility throughout history. Its shiny, glass-like surface made it ideal for creating early mirrors in ancient Mesopotamia, Central America and Europe. Beyond its decorative appeal, obsidian's lack of cleavage and ability to fracture into sharp, smooth edges made it invaluable for crafting surgical blades, arrowheads, knives, spears, jewelry, statuettes and writing tablets. From the Stone Age to medieval times, cultures across the world—including Native Americans—utilized obsidian for hunting, warfare and various practical applications, recognizing it as the sharpest natural cutting material available.

Black Obsidian Metaphysical Properties


Black obsidian is a powerful grounding stone known for its ability to shield against negativity and provide strength. It helps stabilize emotions, absorb negative energies, and promote emotional healing by confronting hidden truths and deep insecurities, fostering spiritual growth. Many use obsidian to remove energy blocks and bring new life to their goals. It is also valued for its physical benefits, such as relieving pain, calming the nervous system, and supporting those suffering from depression or addiction.


Black Obsidian Geological Properties


Obsidian can be found wherever volcanic activity has occurred, with some of the most notable sources today being South America, Japan, Mexico and parts of the United States. However, it is present on every continent, including Antarctica. This hard, brittle and glossy volcanic glass is renowned for its exceptionally sharp cutting edge, which is nearly five times sharper than highly refined steel and at least ten times thinner than a razor blade.

Mineral Information Volcanic, amorphous, siliceous glass
Color Black
Hardness 5 to 5-1/2 (Mohs)
Specific Gravity 2.4 - 2.6
Refractive Index 1.45 - 1.55

Proper Care of Black Obsidian


Black obsidian is considered a durable material and can be safely cleaned using a soft cloth and soapy water. Soap residue can build up on it, so rinse well and polish after. As with most gemstones, ultrasonic cleaners and steamers are not recommended. Take care to store obsidian in a soft case away from hard objects as it can be easily scratched.


To learn more about Black Obsidian and other gemstones, order your copy of Walter Schumann's revised and expanded edition of Gemstones of the World.


Designing with Black Obsidian


Black obsidian's versatility and unique appearance make it an excellent choice for a wide range of jewelry styles, from bold and elaborate to simple and elegant. Because black obsidian is brittle, it is better suited for smaller jewelry pieces like earrings and brooches, which are less prone to the wear and tear that necklaces and bracelets often experience.


Black obsidian beads are popular in necklaces, bracelets, and anklets, where their smooth, polished surface adds a sleek and sophisticated touch, making them perfect for both casual and formal designs. Additionally, black obsidian is often cut into cabochons—smooth, rounded stones without facets—that are well-suited for rings, pendants, and earrings, allowing its natural sheen and glossy, reflective quality to be beautifully showcased.


The bold appearance of black obsidian makes it perfect for statement pieces like large pendants, cuff bracelets or cocktail rings. Its dark color creates a striking contrast when set in silver, gold, or other metals, making the jewelry stand out.


For those who prefer understated elegance, black obsidian works well in minimalist jewelry designs. Simple black obsidian studs, thin band rings with small black obsidian accents or delicate chain necklaces with black obsidian drops are examples of how this stone can be used in subtle yet stylish ways.


Black obsidian is often used in men’s jewelry, such as cufflinks, tie bars, rings and bracelets, due to its strong, masculine appearance. Its dark, glossy finish is particularly appealing in designs that aim for a bold, classic look.

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