Black Obsidian Sphere Natural Volcanic Glass Specimen COA Genuine Display Stone
£ 12.60
GENUINE BLACK OBSIDIAN SPHEREThis Black Obsidian Sphere is a genuine natural volcanic glass specimen,
carefully selected for its deep black colour, smooth polished finish, and striking display appeal. Obsidian is widely collected alongside crystals and minerals, although geologically it is best described as a naturally occurring volcanic glass rather than a true crystalline mineral. Its glossy surface, rich dark tone, and elegant spherical form make it a highly decorative piece for collectors of crystals, rocks, minerals, volcanic specimens, geological items, and natural history displays.This crystal includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine specimen. The photograph shows the actual Black Obsidian Sphere you will receive, allowing you to view the real polish, shape, colour, reflections, surface finish, and individual natural character before purchase. Full sizing details can be seen in the photo. CRYSTAL TYPE AND GEOLOGICAL CLASSIFICATIONBlack Obsidian forms from silica-rich volcanic lava that cools extremely quickly at or near the Earth’s surface. Because the cooling process is so rapid, the atoms do not have time to arrange into a regular crystal lattice. This produces an amorphous glassy material with a smooth texture, vitreous lustre, and distinctive fracture pattern.Obsidian is commonly associated with rhyolitic volcanic environments, where lava has a high silica content. Its composition can include silica, aluminium, iron, magnesium, sodium, potassium, and other trace elements depending on the original volcanic source. The dark black colour is typically linked to very fine mineral inclusions, iron-bearing components, and the natural chemistry of the volcanic glass. VOLCANIC FORMATION AND NATURAL FEATURESBlack Obsidian develops in volcanic settings such as lava flows, volcanic domes, and rapidly cooled margins of molten rock. When lava is exposed to air, water, or cooler surrounding rock, it can solidify so quickly that large crystals cannot form. This creates the dense, glass-like structure that makes obsidian so recognisable.One of the most notable geological traits of obsidian is its conchoidal fracture. When broken naturally, obsidian can produce curved, shell-like surfaces and sharp edges similar to fractured glass. Although this specimen has been polished into a sphere, the material’s volcanic origin and glassy nature remain central to its geological identity. Some examples of black obsidian may show subtle grey tones, tiny specks, faint flow textures, slight translucency on thinner edges, or reflective surface variation depending on lighting. POLISHED SPHERE FORM AND DISPLAY APPEALThis specimen has been shaped and polished into a sphere, a classic lapidary form that presents the volcanic glass evenly from all sides. The rounded shape gives the piece a balanced, sculptural appearance, while the polished surface enhances the natural black lustre of the obsidian. Under suitable lighting, the sphere may show mirror-like reflections, soft highlights, and subtle changes in tone across the surface.The simple black colour makes this specimen highly versatile for display. It can be placed in a mineral cabinet, on a shelf, desk, sideboard, bookcase, office display, study area, or as part of a curated natural history arrangement. It pairs well with other geological specimens such as quartz, amethyst, smoky quartz, rose quartz, labradorite, agate, jasper, calcite, fluorite, pyrite, fossils, shells, and other volcanic rocks. COLLECTING AND DECORATIVE INTERESTA Black Obsidian Sphere is an appealing choice for collectors of crystals, minerals, rocks, volcanic glass, polished stones, lapidary pieces, and natural decorative objects. Its origin as rapidly cooled lava gives it strong geological interest, while its polished black surface gives it a clean, refined appearance suitable for modern or traditional display settings.Obsidian also has a long history of human use, particularly because its natural fracture can create sharp edges. It has been used historically for tools, blades, and ornamental objects, adding archaeological and cultural interest to its geological appeal. This specimen is offered as a collectible and decorative natural stone, ideal for those who appreciate genuine Earth materials and display-quality mineral specimens. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Black Obsidian Sphere and includes a Certificate of Authenticity lifetime guarantee generic card. The specimen has been carefully chosen for its polished finish, dark colour, rounded form, geological interest, and display quality. As with all natural volcanic glass specimens, variations in surface reflection, tone, tiny inclusions, and internal structure are part of its natural origin rather than faults.The photo shows the actual Black Obsidian Sphere being offered, so the buyer will receive the exact specimen shown. Full sizing information can be seen in the photo, allowing customers to assess the scale, shape, polish, and appearance of the piece before purchase.
carefully selected for its deep black colour, smooth polished finish, and striking display appeal. Obsidian is widely collected alongside crystals and minerals, although geologically it is best described as a naturally occurring volcanic glass rather than a true crystalline mineral. Its glossy surface, rich dark tone, and elegant spherical form make it a highly decorative piece for collectors of crystals, rocks, minerals, volcanic specimens, geological items, and natural history displays.This crystal includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine specimen. The photograph shows the actual Black Obsidian Sphere you will receive, allowing you to view the real polish, shape, colour, reflections, surface finish, and individual natural character before purchase. Full sizing details can be seen in the photo. CRYSTAL TYPE AND GEOLOGICAL CLASSIFICATIONBlack Obsidian forms from silica-rich volcanic lava that cools extremely quickly at or near the Earth’s surface. Because the cooling process is so rapid, the atoms do not have time to arrange into a regular crystal lattice. This produces an amorphous glassy material with a smooth texture, vitreous lustre, and distinctive fracture pattern.Obsidian is commonly associated with rhyolitic volcanic environments, where lava has a high silica content. Its composition can include silica, aluminium, iron, magnesium, sodium, potassium, and other trace elements depending on the original volcanic source. The dark black colour is typically linked to very fine mineral inclusions, iron-bearing components, and the natural chemistry of the volcanic glass. VOLCANIC FORMATION AND NATURAL FEATURESBlack Obsidian develops in volcanic settings such as lava flows, volcanic domes, and rapidly cooled margins of molten rock. When lava is exposed to air, water, or cooler surrounding rock, it can solidify so quickly that large crystals cannot form. This creates the dense, glass-like structure that makes obsidian so recognisable.One of the most notable geological traits of obsidian is its conchoidal fracture. When broken naturally, obsidian can produce curved, shell-like surfaces and sharp edges similar to fractured glass. Although this specimen has been polished into a sphere, the material’s volcanic origin and glassy nature remain central to its geological identity. Some examples of black obsidian may show subtle grey tones, tiny specks, faint flow textures, slight translucency on thinner edges, or reflective surface variation depending on lighting. POLISHED SPHERE FORM AND DISPLAY APPEALThis specimen has been shaped and polished into a sphere, a classic lapidary form that presents the volcanic glass evenly from all sides. The rounded shape gives the piece a balanced, sculptural appearance, while the polished surface enhances the natural black lustre of the obsidian. Under suitable lighting, the sphere may show mirror-like reflections, soft highlights, and subtle changes in tone across the surface.The simple black colour makes this specimen highly versatile for display. It can be placed in a mineral cabinet, on a shelf, desk, sideboard, bookcase, office display, study area, or as part of a curated natural history arrangement. It pairs well with other geological specimens such as quartz, amethyst, smoky quartz, rose quartz, labradorite, agate, jasper, calcite, fluorite, pyrite, fossils, shells, and other volcanic rocks. COLLECTING AND DECORATIVE INTERESTA Black Obsidian Sphere is an appealing choice for collectors of crystals, minerals, rocks, volcanic glass, polished stones, lapidary pieces, and natural decorative objects. Its origin as rapidly cooled lava gives it strong geological interest, while its polished black surface gives it a clean, refined appearance suitable for modern or traditional display settings.Obsidian also has a long history of human use, particularly because its natural fracture can create sharp edges. It has been used historically for tools, blades, and ornamental objects, adding archaeological and cultural interest to its geological appeal. This specimen is offered as a collectible and decorative natural stone, ideal for those who appreciate genuine Earth materials and display-quality mineral specimens. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Black Obsidian Sphere and includes a Certificate of Authenticity lifetime guarantee generic card. The specimen has been carefully chosen for its polished finish, dark colour, rounded form, geological interest, and display quality. As with all natural volcanic glass specimens, variations in surface reflection, tone, tiny inclusions, and internal structure are part of its natural origin rather than faults.The photo shows the actual Black Obsidian Sphere being offered, so the buyer will receive the exact specimen shown. Full sizing information can be seen in the photo, allowing customers to assess the scale, shape, polish, and appearance of the piece before purchase.
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