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Stones of CeylonRough & Cut
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Cut stone

1.43ct Russian Demantoid with Horsetails

1.43 ct · Demantoid · Garnet

Ural demantoid with the horsetail inclusion that no other locality gives you.

$11,600

$8,111.89 per carat · AUD, GST included where applicable

Stones above $5,000 are sold by arrangement rather than through the basket. Above that value no ordinary courier will both carry and insure a loose stone, so carriage goes through a specialist service and is quoted for your destination — and settlement is by bank transfer, which keeps the card fee off a sum this size.

Enquire about this stone

The person who answers is the person who owns the stone.

  • Sent by a specialist insured service, quoted for your destination.
  • Seven days from delivery to inspect and return for a full refund.
  • One of a kind — when it sells it is gone, and the listing stays up as a record.
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About this stone

Demantoid has higher dispersion than diamond, and a well-cut round like this throws visible fire in almost any light. The horsetail — a radiating spray of chrysotile fibres from a chromite crystal — is diagnostic of Ural Mountain material and is regarded as a feature rather than a fault, which is one of the few places in the trade where an inclusion adds value.

Slightly included by grading convention, entirely because of that horsetail.

Specification

Specification for 1.43ct Russian Demantoid with Horsetails
FormCut stone
SpeciesGarnet — Demantoid
Weight1.43 ct
ShapeRound
Measurements6.4 × 6.3 × 4.2 mm
ColourVivid grass green, slightly yellowish, very high dispersion
Colour familyGreen
ClaritySlightly included
CutRound brilliant
PhenomenaStrong dispersion
OriginUral Mountains, Russiaour assessment

How big it actually is

ANY BANK CARD
The stone’s 6.4 × 6.3mm outline, drawn to the same scale as a bank card. Hold one against the screen and the stone beside it is life size — if the card does not match, zoom until it does. The outline is the idealised shape rather than this stone’s own profile; the photographs are the stone.

Treatment & certification

Unheated

No heat and no other treatment of any kind. Bought at source, so the heat status is known rather than assumed.

How we know

Untreated. Horsetail inclusions are diagnostic of Ural material.

Certification arranged with the sale

A stone at this level does not go through the basket, so the report is arranged as part of the sale rather than added at checkout. We’ll send it to GIA, SSEF, Gübelin, GRS or Lotus, quote the fee with the stone, and nothing is dispatched until the report is back. Allow three to six weeks.

We use the international laboratories rather than local ones, which is the point of paying for it.

Every listing on this site states its treatment, including when the honest answer is that we don’t know. How we describe stones.

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