Giant 9″ Obsidian Natural Volcanic Glass Crystal | Genuine Black Lava Stone Mineral with Certificate of Authenticity

Description

Giant 9″ Obsidian – Natural Volcanic Glass Crystal

This impressive 9-inch Giant Obsidian Crystal is a magnificent specimen of natural volcanic glass, formed through the rapid cooling of high-silica lava. The result is a glossy, jet-black crystal with a glassy lustre and smooth surface, showcasing the raw power of Earth’s geological processes. Each specimen is 100% genuine, hand-selected for its exceptional quality and aesthetic presence. The exact piece shown in the photo is the specimen you will receive, accompanied by a Certificate of Authenticity verifying its natural origin.

Geological Background and Formation

Obsidian forms during volcanic eruptions when felsic (silica-rich) magma cools too rapidly for crystal growth to occur, resulting in a natural glass rather than a crystalline structure. This process often takes place along the edges of rhyolitic lava flows, where the molten material solidifies quickly upon exposure to air or water. The geological environment responsible for its creation is one of intense energy, rapid transformation, and extreme heat — typically exceeding 850°C.

Geologically, Obsidian is a mineraloid rather than a true mineral, as it lacks an ordered atomic structure. Despite this, it is composed primarily of silicon dioxide (SiO₂), similar to quartz, with minor inclusions of iron, magnesium, and other trace elements that contribute to its characteristic black or dark brown colouration. The occasional presence of microscopic crystals or gas bubbles can result in subtle variations, such as mahogany, snowflake, or rainbow obsidian.

Physical and Mineralogical Characteristics

Chemical Composition: Primarily SiO₂ (Silicon Dioxide)

Crystal Habit: Amorphous (non-crystalline)

Hardness: 5–5.5 on the Mohs scale

Lustre: Vitreous to glassy

Fracture: Conchoidal (shell-like, razor-sharp edges)

Transparency: Translucent at thin edges, opaque in mass

Colour: Predominantly jet-black, occasionally with dark brown or grey hues

The conchoidal fracture of obsidian produces exceptionally sharp edges, a trait that made it highly valued by ancient civilisations for crafting blades, spearheads, and ceremonial objects. Archaeological discoveries have revealed obsidian artefacts dating back thousands of years, demonstrating its importance as both a practical and symbolic material in human culture.

This giant specimen displays the distinctive sheen and smooth texture characteristic of high-quality volcanic glass. Its natural polish enhances its visual depth, revealing subtle flow bands formed during the rapid solidification of lava. These patterns are evidence of the dynamic movement and cooling history of the molten rock.

Geological Origin and Occurrence

Obsidian is found in volcanic regions across the globe, including Iceland, Mexico, the United States (notably in Oregon and Arizona), Japan, and Italy. It often occurs near the margins of rhyolitic lava flows, domes, and volcanic plugs. These geological environments produce the high-viscosity magmas necessary for the formation of glassy rocks like obsidian.

The 9-inch specimen offered here represents the pinnacle of obsidian formation — a substantial, solid piece of volcanic glass formed during the explosive and cooling phases of a silicic eruption. Such large specimens are increasingly sought after by collectors, geologists, and interior designers for their natural beauty and scientific significance.

Scientific and Metaphysical Significance

From a geological perspective, obsidian provides valuable insight into volcanic processes and the chemistry of high-silica magmas. Its glassy texture preserves evidence of flow dynamics and cooling rates, making it a key material for studying the physical properties of volcanic rocks.

In addition to its geological appeal, obsidian has long been admired for its symbolic and metaphysical associations. Often called the “mirror stone,” it is believed to promote grounding, protection, and clarity. Its reflective surface was even used in antiquity for scrying and ceremonial mirrors, adding to its mystique and cultural value.

Authenticity and Presentation

Every Giant Obsidian Crystal offered by UKGE LTD is a 100% genuine natural specimen and includes a Certificate of Authenticity confirming its provenance. The photograph shows the actual specimen you will receive, ensuring complete transparency and authenticity. A 1 cm scale cube is shown for accurate size reference.

This spectacular 9″ Giant Obsidian Natural Volcanic Glass is both a geological masterpiece and a striking collector’s display. Its deep black sheen, natural formation history, and substantial size make it a remarkable addition to any mineral collection, home décor setting, or educational exhibit.