Green Tourmaline Crystal Dorothea Quarry Wales Natural Elbaite Specimen

Genuine Green Tourmaline – Dorothea Quarry (Whitemoor), Wales

This Green Tourmaline specimen from Dorothea Quarry (Whitemoor), Wales, is a genuine and carefully selected natural crystal. The photograph provided shows the exact specimen you will receive. Please refer to the images for full sizing and scale details.

This crystal includes a Certificate of Authenticity lifetime guarantee generic card confirming its genuine identity and Welsh provenance.

---

Mineral Species & Scientific Classification

Green Tourmaline most commonly belongs to the elbaite species within the tourmaline supergroup, a complex borosilicate mineral group with a highly variable chemical composition.

Mineral Group: Tourmaline Supergroup
Common Species (Green Variety): Elbaite
General Formula: Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
Mineral Class: Cyclosilicate (Borosilicate)
Crystal System: Trigonal
Hardness: 7–7.5 on the Mohs scale
Lustre: Vitreous
Transparency: Transparent to translucent to opaque

The green colour in tourmaline is typically caused by iron, chromium or vanadium within the crystal structure. Crystals characteristically form as elongated prismatic columns with strong vertical striations along the prism faces.

Tourmaline is known for its complex internal chemistry, resulting in colour zoning, inclusions and subtle variation within individual crystals.

---

Geological Setting – Dorothea Quarry, North Wales

Dorothea Quarry, located near Talysarn in Gwynedd, Wales, is a historically significant slate and mineral locality. The area is associated with Ordovician volcanic and sedimentary sequences that were later affected by regional metamorphism and hydrothermal activity.

Tourmaline formation in such environments typically occurs in:

• Pegmatitic intrusions

• Hydrothermal veins

• Metamorphic host rocks

• Quartz-rich fracture systems

Boron-rich fluids interacting with aluminium-bearing rocks create ideal conditions for tourmaline crystallisation. In Welsh localities, tourmaline may be associated with quartz, feldspar, mica or slate-derived host rock.

Specimens from documented UK localities such as Dorothea Quarry are particularly desirable for collectors of British minerals due to their regional geological significance.

---

Crystal Form, Colour & Natural Features

This specimen displays natural green tourmaline crystal growth, potentially exhibiting:

• Elongated prismatic habit

• Vertical striations on crystal faces

• Rich green to deep forest-green coloration

• Possible colour zoning along the crystal length

• Natural matrix attachment

Green tourmaline crystals may range from translucent to opaque depending on internal inclusions and growth conditions. Surface lustre is typically vitreous and reflective under light.

No artificial treatments or enhancements are implied; this is a natural mineral specimen presented in its original form.

---

Collectibility & Display Appeal

Green Tourmaline from UK localities is less common than material from major global pegmatite regions, making Welsh examples particularly interesting for regional collectors.

Collectors value such specimens for:

• Recognised Dorothea Quarry provenance

• Classic trigonal tourmaline crystal habit

• Natural green coloration

• Association with historic Welsh quarrying districts

This piece is well suited for a British mineral cabinet, a regional geology collection, or a display focused on pegmatite and hydrothermal mineralisation.

Tourmaline has been traditionally associated in various cultures with balance and protection in a spiritual sense, though this listing focuses entirely on its geological and mineralogical importance.

---

Authenticity & Presentation

This Green Tourmaline specimen has been carefully chosen for its crystal form, locality significance and natural presentation. The image shown is of the exact specimen you will receive.

Included with your purchase is a Certificate of Authenticity lifetime guarantee generic card confirming this is a genuine Green Tourmaline crystal from Dorothea Quarry (Whitemoor), Wales.

A distinctive example of Welsh tourmaline mineralisation, this authentic specimen combines recognised UK locality, classic crystal structure and natural geological character in one carefully selected collector’s piece.