Natural Black Tourmaline Stone — 5.88 Carat (6.46 Ratti)
Photos: Use main, back, in-hand, and side photos for colour, polish, thickness, and real size.
What you are buying: A heavier natural black tourmaline at 5.88 carat (about 6.46 ratti), Oval Mixed Cut. Good when you want a strong face-up look and do not mind a bit more height on the finger (**6.5 mm** depth). Ratna Gems lists this as natural tourmaline (schorl type). If testing paperwork is included with your shipment, read it for that provider’s conclusions.
Documentation: If a gem testing report is included with your order, it is the official source from that laboratory only. We do not reproduce your specific document here.
Colour: Ratna Gems specification: greenish black — black with a possible soft green hint. Photos show this stone. Product title stays “black tourmaline” for search.
Gem facts: Usually iron-rich schorl. GIA: tourmaline about 7–7.5 Mohs — fine for jewelry with sensible protection.
Size: About 12 × 9 × 6.5 mm. Tell your jeweler if you need a lower seat or a protective bezel.
| Detail | Value |
|---|---|
| Weight | 5.88 Carat (6.46 Ratti) |
| Size (L × W × H) | 12 × 9 × 6.5 mm |
| Colour (Ratna Gems specification) | Greenish Black |
| Shape / cut | Oval Mixed Cut |
| Transparency | Opaque (light does not pass through this stone) |
| Luster | Vitreous (glass-like shine, typical for natural tourmaline) |
| Chemical composition | Iron-rich tourmaline (schorl type) — complex boron aluminium silicate. Reference formula: NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄ |
| Stone type / variety | Natural Tourmaline — black tourmaline (schorl) |
| Hardness | 7.0 to 7.5 on Mohs scale (see GIA tourmaline overview) |
| Specific gravity (typical range, schorl) | About 3.06 to 3.25 |
| R.I. (reference range) | 1.61 to 1.65 — typical range for this material; confirm against any documentation supplied with your order. |
| Treatment | Un-Heated & Un-Treated |
| Indian / trade name | Vikrant Mani |
| Material (Ratna Gems listing) | Natural tourmaline (black tourmaline / schorl) — how we describe and sell this stone. Verify on any authentication paperwork included with your purchase. |
Why people buy black tourmaline
Dark, natural gem with a big presence in gold or silver — statement rings and pendants are common.
Astrology and belief (read this)
Not Navratna, not a classical Neelam substitute. Often for jewelry or belief-based use. No promised results. For astrology, ask your own expert.
Is this stone right for you?
Pick this if you want the batch’s largest natural black tourmaline and accept a taller mount (**6.5 mm**). Bezel or low basket helps for daily rings.
Simple care
- Warm water, mild soap, soft brush.
- Avoid shocks and sudden temperature change.
- Store apart from softer stones.
Shop Tourmaline Stone. Guide: Black Tourmaline complete guide.
