Natural Black Tourmaline Crystal Specimen
Specifications
| Mineral | Tourmaline |
| Colour | Black |
| Form | Natural crystal specimen |
| Dimensions | 34 x 32 x 13 mm |
| Weight | 17.3 grams |
| Condition | Natural, as mined |
| Hardness | 7 to 7.5 on the Mohs scale |
| Birthstone | October |
| SKU | SPO001 |
About Tourmaline
Tourmaline is not one mineral but a group of related borosilicates sharing a structure while differing in chemistry. That flexibility gives tourmaline the widest colour range of any gem family, including bicoloured crystals that shift along their length. You can read more via gemmological reference, mineral data.
Tourmaline crystallises in granitic pegmatites and in some metamorphic rocks, forming the long striated prisms collectors recognise. Chemistry can change as a crystal grows, producing the banded watermelon effect.
Why You Will Love This Specimen
💎 Uncut Crystal Form
Retaining its original growth faces and natural termination, this specimen provides a genuine reference example of primary mineral formation for your study collection.
✨ Deep Colour Saturation
The opaque black body colour absorbs light across its striated surfaces, creating strong visual contrast when placed alongside lighter-toned mineral specimens.
🔷 Cabinet Display Potential
Its upright prismatic habit allows for straightforward placement on a mineral display shelf without requiring custom armature or complicated mounting brackets.
📦 Exactly What Is Pictured
The photographs and video show this specimen. You receive the specimen pictured, not a lookalike.
Popular Uses
Tourmaline is used across all jewellery types and is a favourite among designers for its colour palette. At 7 to 7.5 it is a practical choice for regularly worn pieces. Specimens like this are collected and displayed rather than set into jewellery.
Ideal For
- A dedicated mineral species collection
- A gift for a geology enthusiast
- A natural desk display piece
- A study reference for crystal habits
More From Gemystic
Browse the rest of our specimens, see more tourmaline, or view the full catalogue. Everything we list is weighed, measured and photographed individually before it goes online.
Care Instructions
- Dust gently with a soft dry artist brush
- Store separately from softer minerals on your display shelf
- Handle with clean hands to preserve the natural surface texture
- Avoid ultrasonic cleaners unless a gemmologist has checked the stone first.
Buying From Gemystic
✅ 100% natural, nothing hidden
We do not deal in synthetic or laboratory-grown material. Every piece is photographed to show its real detail, including the inclusions and marks a seller might prefer to leave out of shot.
📮 Delivery arranged with you directly
As soon as your order is placed we contact you to arrange delivery, so nothing about the shipment is a surprise.
↩️ 7-day returns
Returns are accepted within 7 days, counted from the day the item reaches you.
Frequently Asked Questions
How big is this specimen?
It measures 34 x 32 x 13 mm and weighs 17.3 grams. Those figures were taken from this piece, so use them rather than judging scale from the photographs.
How should I clean this raw crystal specimen?
Dust the crystal gently using a soft, dry brush to keep the natural striations clear. Avoid soaking the specimen in harsh chemical solutions or exposing it to sudden thermal shifts.
Is this mineral prone to cleavage or splitting?
Tourmaline has poor cleavage, meaning it lacks distinct planes along which it easily splits. However, it can still fracture under sharp impacts, so handle it carefully during shelf rearrangement.
Why do some crystal faces show vertical lines?
Those lines are natural striations formed during the crystal growth process as mineral-rich fluids moved through the pegmatite pocket. They are a hallmark of authentic rough tourmaline.
How does this compare to quartz crystals?
While quartz often forms hexagonal prisms with distinct pyramid tips, tourmaline commonly displays rounded triangular cross-sections and heavily striated prism faces.
How long does delivery take, and can I return it?
We contact you directly as soon as your order is placed to arrange delivery, so you always know where the parcel is. Returns are accepted within 7 days of the date you receive the item.
Are your stones natural, or are any of them synthetic?
Everything we sell is 100% natural. We do not deal in synthetic or laboratory-grown material, and we do not hide anything about a piece: the photographs are shot to show every detail, including the ones a seller might prefer you did not see.
Will I receive the specimen in the photographs?
Yes. Each specimen is listed on its own and the photographs were shot from this exact piece. Once it sells the listing comes down.
Add This Tourmaline Specimen to Your Collection
One natural crystal at 17.3 grams. There is only this piece, so once it sells the listing closes. See the full collection.
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