Description
Genuine Obsidian Obelisk Point Specimen
This Obsidian Obelisk Point is a carefully selected natural volcanic glass specimen carved and polished into a tall obelisk-style tower. The specimen shown in the listing photographs is the exact piece you will receive, allowing collectors and buyers to view the deep black colour, smooth glassy polish, and natural characteristics before purchase. Full sizing and proportions can be clearly seen in the photographs provided.
Each piece includes a Certificate of Authenticity lifetime guarantee generic card, confirming that the stone is a genuine natural obsidian specimen. Obsidian obelisks are widely appreciated by mineral collectors, geology enthusiasts, and decorative stone collectors for their striking appearance and volcanic origin.
Geological Classification and Mineral Type
Obsidian is a naturally occurring volcanic glass formed from rapidly cooled molten lava. Because the lava cools so quickly, the atoms do not have enough time to organise into a crystalline structure. As a result, obsidian lacks a crystal lattice and is classified as a mineraloid rather than a true mineral.
The composition of obsidian is typically rich in silica (silicon dioxide) along with trace amounts of iron, magnesium, and other elements that were present in the original magma. The high silica content contributes to the viscosity of the lava, which allows it to cool quickly and form natural glass.
Unlike crystalline minerals such as quartz or feldspar, obsidian has an amorphous internal structure, meaning it does not form regular crystal shapes.
Colour and Physical Characteristics
Black obsidian is recognised for its deep black colour and glass-like surface, which becomes highly reflective when polished. The smooth texture and sharp conchoidal fracture patterns are typical features of volcanic glass.
Typical physical properties include:
• Colour: Deep black to very dark brown
• Lustre: Vitreous (glass-like)
• Transparency: Opaque to slightly translucent along thin edges
• Structure: Amorphous volcanic glass
• Fracture: Conchoidal, producing curved shell-like surfaces
• Hardness: Approximately 5 to 5.5 on the Mohs scale
The polished finish highlights the natural reflective quality of the glass surface while maintaining the stone’s natural volcanic character.
Formation and Volcanic Origins
Obsidian forms during volcanic eruptions when silica-rich lava cools extremely rapidly upon contact with cooler air or water. This rapid cooling prevents crystal formation, trapping the molten material in a glass-like state.
The formation typically occurs along the edges of lava flows or volcanic domes where molten rock is exposed to sudden temperature changes. The result is a dense, smooth volcanic glass that can fracture into extremely sharp edges.
Obsidian deposits are commonly found in geologically active volcanic regions around the world, including areas in Mexico, the United States, Iceland, Japan, Turkey, Armenia, and parts of Central and South America.
Each volcanic region may produce obsidian with slightly different chemical compositions depending on the characteristics of the magma from which it formed.
Obelisk Shape and Decorative Craftsmanship
This specimen has been carved into a four-sided obelisk tower, a geometric shape inspired by ancient stone monuments. The obelisk gradually tapers to a pointed tip, creating a balanced vertical display piece.
The polished faces reflect light across the surface of the obsidian, highlighting its natural glossy appearance. The obelisk shape also allows the stone to stand upright for display in mineral collections or decorative environments.
Obelisk towers are widely used for mineral displays, gemstone collections, home décor arrangements, and educational geological collections, where their clean geometric form complements the natural beauty of the stone.
Historical and Cultural Context
Obsidian has played an important role throughout human history due to its sharp fracture edges and attractive appearance. Ancient civilisations used obsidian to create tools, blades, mirrors, jewellery, and ceremonial objects.
Archaeological discoveries show obsidian artefacts dating back thousands of years, particularly in regions where volcanic deposits were accessible.
In various cultural traditions, obsidian has been traditionally associated with symbolic protection and reflection, though these interpretations arise from historical belief systems rather than scientific claims.
Authentic Specimen and Item Details
• Genuine natural Obsidian volcanic glass specimen
• Polished obelisk tower point shape
• Deep black glass-like appearance
• Mineraloid composed primarily of silica-rich volcanic glass
• Carefully selected individual specimen
• The exact stone shown in the photographs is the one you will receive
• Includes Certificate of Authenticity lifetime guarantee generic card
• Full sizing and scale visible in listing photographs
This Obsidian Obelisk Point is a striking volcanic glass specimen that showcases the smooth reflective surface and geological origin of one of the most distinctive natural volcanic materials found on Earth.
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