Natural Green Cap Tourmaline on Quartz Crystal Cluster · 227 g · Crystal Cluster / Mineral Specimen

$121.95

Natural Green Tourmaline on Quartz crystal cluster weighing approximately 227 g and measuring around 8.5 × 6.5 cm. This unique collector specimen combines clear to white Quartz crystals with contrasting dark green to green-black Tourmaline, displaying natural crystal terminations, growth textures and strong three-dimensional character. Unpolished natural formation – exact specimen shown.

1 in stock

NGB Reference: NGB-000423 SKU: CL-TOUR026MC-003-421 Category: Brand:
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This exceptional natural Green Cap Tourmaline on Quartz crystal cluster is a highly attractive collector mineral specimen combining well-developed Quartz crystals with contrasting dark green to very deep green Tourmaline.

Weighing approximately 227 grams and measuring around 8.5 × 6.5 cm, the specimen presents a balanced natural composition with strong three-dimensional structure and excellent visual contrast between the lighter Quartz matrix and the darker Tourmaline crystals.

The Quartz portion consists of naturally formed clear to white, transparent to translucent crystals, several of which display well-defined terminations and reflective crystal faces. Their brightness provides a strong visual counterpoint to the darker Tourmaline and enhances the depth of the entire cluster.

The Tourmaline crystals display tones ranging from dark green to green-black, with natural prismatic growth and a strong structural presence within the formation. The deep colour and elongated Tourmaline habit create a distinctive contrast against the Quartz, giving the specimen a particularly expressive collector appearance.

The term Green Cap Tourmaline is used descriptively for the green-coloured Tourmaline present in this specimen. Tourmaline belongs to a complex mineral group, and the exact mineral species should only be assigned when supported by specific mineralogical analysis.

No cutting, polishing or artificial shaping has been applied. The specimen retains its natural crystal formation, including its original crystal faces, growth textures, contact points and geological surface characteristics.

Natural mineral clusters may show small contact marks, uneven growth surfaces, minor edge abrasions, internal fractures or naturally incomplete crystal faces. These are normal characteristics of an unmodified mineral specimen and form part of its geological history.

The combination of well-developed Quartz crystals, contrasting dark green Tourmaline and a naturally balanced cluster formation makes this specimen particularly suitable for a mineral collection, cabinet display, geological collection or premium natural crystal decor.

This is a unique individual specimen. The buyer will receive the exact piece shown in the product photographs.

With its striking contrast between bright Quartz and deep green Tourmaline, this 227 g natural mineral cluster offers strong geological character and considerable visual presence. The natural crystal architecture, varied reflective surfaces and contrasting mineral growth make it an individual display specimen that can be appreciated from multiple viewing angles.

Overall Score: 92/100

NGB Grade: Excellent

Quality Evaluation

Color18.0/20
Material Quality18.0/20
Natural Characteristics18.0/20
Shape, Symmetry & Polish19.0/20
Overall Appeal19.0/20

Evaluation Notes

Individually evaluated natural Green Tourmaline cluster. Shape/Symmetry/Polish is interpreted for this product family as natural composition, crystal distribution, structural integrity and presentation rather than as a polished-stone criterion.

Species

Quartz, Tourmaline

Gemstone Variety

Quartz, Tourmaline

Color

Multicolor

Treatment

Unheated, Untreated

Transparency

Translucent, Transparent

Gemological Properties

Dimensions8.5 × 6.5 cm
TransparencyTransparent
ClarityN/A
Crystal SystemTrigonal
LusterNot Graded in Rough State
Color DescriptionClear / White Quartz with Green to almost Black Tourmaline
Transparency NotesTransparency varies across the natural crystal formation according to the dominant mineral and individual specimen.
Natural CharacteristicsNatural cluster formation dominated by Green Tourmaline, with individual crystal growth, surface texture and specimen-specific mineral relationships. Associated matrix/minerals include Quartz; these are retained as natural characteristics and are not used as the primary taxonomy. A lighter green cap-like optical appearance can be visible on the upper crystal under certain lighting.

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