Natural Black Tourmaline Stone 5.88 Carat (6.46 Ratti)

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.