Description
6mm Rainbow Obsidian Bead Bracelet – Genuine Volcanic Glass Specimen
This 6mm Rainbow Obsidian Bead Bracelet is crafted from genuine natural volcanic glass, carefully selected for its subtle iridescent sheen and polished into uniform round beads. The photograph provided shows the actual bracelet you will receive. Full sizing please see photo for accurate bead dimensions and overall scale.
This genuine specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming the authenticity of the rainbow obsidian used in this piece.
Geological Identification – Rainbow Obsidian (Volcanic Glass)
Rainbow obsidian is a naturally occurring volcanic glass formed from rapidly cooled, silica-rich lava. Unlike crystalline minerals, obsidian lacks an ordered crystal lattice due to its extremely rapid cooling, resulting in an amorphous structure. Its chemical composition is typically high in silica (SiO₂), often exceeding 70%, placing it in the rhyolitic compositional range.
The distinctive “rainbow” effect seen in this variety is caused by microscopic inclusions or internal layering of magnetite or other mineral particles within the glass. When polished and viewed under strong light, these internal structures produce subtle iridescent bands displaying hues such as green, gold, purple, or red. This optical effect is not a surface coating but a natural internal feature revealed by shaping and polishing.
Obsidian typically exhibits a vitreous lustre, sharp conchoidal fracture and excellent polish. With a Mohs hardness of approximately 5 to 5.5, it is softer than quartz but durable enough for bead jewellery when properly shaped and finished.
Formation and Volcanic Environment
Obsidian forms in extrusive igneous environments where lava cools so rapidly that mineral crystals do not have time to develop. This commonly occurs along the margins of rhyolitic lava flows, volcanic domes and explosive volcanic settings.
Rainbow obsidian deposits are well known from volcanic regions such as Mexico and the western United States, where rhyolitic volcanic activity has produced extensive glassy lava flows. The iridescent banding results from internal flow layering and microscopic mineral alignment during the final stages of lava solidification.
The depositional environment is therefore linked to high-silica volcanic eruptions, often associated with continental crustal melting and explosive volcanic systems.
Bead Craftsmanship and Bracelet Design
Each bead in this bracelet measures approximately 6mm in diameter and has been precision-shaped into a smooth sphere. The careful polishing enhances the natural vitreous shine of the volcanic glass and reveals the subtle rainbow sheen under angled light.
The smaller 6mm bead size creates a refined and versatile bracelet suitable for stacking or wearing alone. The dark body colour provides a dramatic contrast to the iridescent bands, making each bead visually engaging while maintaining a classic black gemstone appearance.
Due to the natural origin of obsidian, slight variations in iridescence and internal patterning may be present, contributing to the uniqueness of the individual bracelet shown in the photograph.
Mineral Collecting and Geological Interest
Rainbow obsidian is highly regarded among mineral and gemstone collectors for its natural glassy texture and optical effects. Unlike crystalline gemstones, obsidian represents volcanic glass preserved in a near-original molten state, offering direct insight into rapid geological processes.
Its conchoidal fracture and glassy structure have been historically significant in tool-making cultures, where obsidian was used for cutting implements due to its sharp edges.
In bead form, this bracelet preserves the geological identity of volcanic glass while presenting it in a wearable format suitable for both jewellery enthusiasts and mineral collectors.
Authenticity and Presentation
This 6mm Rainbow Obsidian Bead Bracelet is a genuine volcanic glass specimen. The photograph shows the exact bracelet you will receive. Full sizing please see photo for scale and proportions.
Included is a Certificate of Authenticity lifetime guarantee generic card, providing assurance of the natural origin of the obsidian.
Combining volcanic geology, natural iridescence and polished craftsmanship, this rainbow obsidian bead bracelet offers a distinctive and scientifically fascinating addition to any gemstone or mineral collection.
