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Kashmir Sapphires

A Kashmir sapphire is a blue sapphire from the Padar region of Jammu and Kashmir in the north-western Himalaya, where a single deposit worked mainly between 1881 and the 1920s produced velvety, medium-dark, slightly violetish blue stones that remain the benchmark for the species. Production ended before the 1930s, so every Kashmir sapphire in the trade has been changing hands for a century. Byrex Gems keeps Kashmir sapphires in its Toronto vault for the trade, filmed unedited in our office, shown on request by appointment, with prices for approved buyers.

Where to buy Kashmir sapphires in Toronto

New Kashmir sapphires come in regularly, and what we don't hold ourselves we can source through our offices worldwide. Viewings are at our Toronto office, 27 Queen Street East, Suite 407, steps from Queen subway station, by appointment. We have supplied coloured gemstones and natural fancy colour diamonds to jewellers and designers since 1988, and welcome private clients by appointment. Prices are shown to approved trade accounts; private clients can ask us on WhatsApp, where we reply within 12 hours, or by email within 24 hours. Every stone ships insured, worldwide.

Where Kashmir sapphires come from

The Kashmir deposit lies high in the Zanskar range of the Padar region, in the Himalaya of what is now the Indian union territory of Jammu and Kashmir, at an altitude where the ground is free of snow for only a few months each year. It was exposed by a landslide around 1881 and worked intensively for the Maharaja of Kashmir through the 1880s, the period that produced most of the famous stones. Later workings in the early twentieth century were smaller, and by the 1920s, and certainly before the 1930s, production had effectively ended.

The sapphires grew in pegmatite that had altered to a soft, kaolin-rich rock, and the crystals came out as rough prisms, often large, with colour concentrated in the core. Their colour is a medium to medium-dark blue with a slight violet tint, strongly saturated but soft, and it holds without change under incandescent light.

What makes a Kashmir sapphire recognisable is the velvet. Silk so fine that it reads as a haze rather than needles scatters light inside the stone, so the blue seems to glow from within rather than flash from the facets. The word cornflower was attached to this colour because of these stones.

How laboratories determine Kashmir origin

Kashmir is the most scrutinised origin opinion in sapphire, because the premium attached to it is the largest. Laboratories reach it by comparing a stone's inclusions, trace-element chemistry and spectra with reference stones of known provenance: the fine, hazy silk, the particle clouds and zoning that Kashmir crystals show, together with chemistry that separates them from Sri Lanka, Burma and Madagascar.

The separations are not trivial. Madagascar's Bemainty deposit, found in 2016, produced blues whose velvety texture resembles Kashmir closely enough that the laboratories studied them at length, and some Ceylon and Burmese stones overlap at the edges. GIA, GRS, SSEF, Gübelin, Lotus and AGL all issue Kashmir opinions; a careful laboratory states origin as inconclusive when the evidence does not decide, and the trade expects two reports, often from the Swiss laboratories or AGL, before an important stone is sold as Kashmir.

Kashmir sapphires are almost always unheated, and reports read "no indications of heating" at GIA, Gübelin and SSEF or "no indication of thermal treatment" at GRS. A heated stone with a Kashmir opinion is unusual and should be priced accordingly. Royal blue may be granted on the laboratories' criteria to the stronger stones; cornflower is the trade's own word for the rest.

What to check before buying a Kashmir sapphire

Begin with the paper. Two reports from laboratories whose Kashmir opinions are respected, agreeing on origin and on no indications of heating, are the minimum for an important stone, and the reports should match the stone by weight, measurements and photograph. Old reports deserve renewal, because origin methods have advanced and a current opinion is what a buyer will ask for.

Provenance adds weight. Most Kashmir sapphires in circulation have come out of estate jewellery, and a documented history, whether an old auction catalogue, a maker's archive or a family record, supports the laboratory's opinion. A stone with no history is not disqualified, but the reports carry the whole burden.

Then the stone. Look for the velvet in daylight viewed from the top, a colour that stays blue under a lamp, and no zoning visible from above. Many Kashmir stones were cut a century ago and carry old proportions; recutting is a serious decision, because weight lost from a Kashmir sapphire is expensive and the original cut is part of the provenance. Pairs are, for practical purposes, unobtainable. At the bench, sapphire takes normal handling, but a Kashmir stone should be set by someone who knows what it is.

What drives the value of a Kashmir sapphire

Origin is the first factor and the reason the stone is in a category of its own. A Kashmir opinion from two respected laboratories, with no indications of heating, places a sapphire above an equivalent Burmese or Ceylon stone by a wide margin, and the margin grows with size.

Colour and texture then rank the Kashmir stones among themselves. The finest show the medium-dark, slightly violetish blue with full velvet and no zoning from the top; paler, greyer or zoned stones are still Kashmir but sit lower. Clarity is judged leniently where silk is concerned and strictly for anything else. Size compounds all of it, and a Kashmir sapphire of five carats or more with fine colour is rare in any decade.

Provenance is the last factor and, for this origin, a real one. Kashmir sapphires hold the per-carat records for sapphire at auction, and a stone that can be traced to a named jewel or collection carries a premium of its own.

History, famous examples and Byrex's vault

The deposit's working life was short. Discovered around 1881, it was mined for the Maharaja through the 1880s under conditions that allowed only a summer season, examined by geologists from British India, and worked again on a smaller scale in the early twentieth century before the ground was exhausted. Nearly everything that matters came out in those first years and was cut and sold in Europe.

The stones went into the great jewels of the period, and they reappear at auction with the names of Cartier, Boucheron and Van Cleef & Arpels attached. Kashmir sapphires have set and reset the per-carat record for sapphire repeatedly, and each sale is reported with the laboratory's wording.

Byrex keeps Kashmir sapphires in the vault rather than on the website. They are shown on request, by appointment, to trade buyers and private clients with a specific requirement, with their reports and whatever provenance accompanies them, and they are filmed unedited in our office like every other stone.

Buying Kashmir sapphires from Byrex Gems

Kashmir sapphires are too rare to be shown as regular stock, so they are kept in the vault rather than on the website. Byrex Gems has served the jewellery trade from Toronto since 1988, and more than seven thousand jewellers, designers and dealers have bought from us; when a Kashmir stone is right for you, we will know where to look. Tell us the size, shape, colour and budget you have in mind, and whether you need an unheated stone or a particular laboratory report.

WhatsApp +1 (437) 450-3786 is answered within hours, and an email to info@byrex.com the same day, seven days a week. When a suitable stone is available, we send photos and video first, and private viewings are arranged by appointment in Toronto, Hong Kong, Bangkok and Dubai.

Kashmir Sapphires: questions buyers ask

Where is Kashmir sapphire mined?

In the Padar region of Jammu and Kashmir, high in the Zanskar range of the Himalaya. The deposit was found around 1881 and worked mainly in the 1880s and sporadically into the 1920s; production effectively ended before the 1930s, and there is no active mining of consequence today.

Why are Kashmir origin reports so scrutinised?

Because the premium for Kashmir is the largest in sapphire and the deposit is closed, so every call rests on comparison with reference stones. Laboratories separate Kashmir from Madagascar, Ceylon and Burma by inclusions and chemistry, state inconclusive when unsure, and the trade expects two reports.

Are Kashmir sapphires ever heated or treated?

Almost never. Kashmir sapphires are typically unheated, and reports read no indications of heating. A heated stone with a Kashmir opinion is unusual and should be priced as a heated sapphire. Byrex states treatment exactly as the laboratory words it.

Which reports does Byrex supply with Kashmir sapphires?

Two reports from laboratories whose Kashmir opinions are respected, typically SSEF, Gübelin, AGL, GRS or GIA, agreeing on origin and treatment, with the provenance that accompanies the stone. A further or renewed report can be arranged on request.

What does a Kashmir sapphire look like?

A medium to medium-dark blue with a slight violet tint, strongly saturated but soft, with a velvety glow from silk so fine it reads as a haze. The colour holds without change under incandescent light. The look gave the trade the term cornflower blue.

Does Byrex sell Kashmir sapphires to private clients?

Yes, by appointment at 27 Queen Street East, Suite 407, Toronto, to private clients with a specific requirement as well as to the trade. The stones are kept in the vault and shown on request; prices are released to approved trade buyers who sign in.

Can I see a Kashmir sapphire in Toronto?

On request. Kashmir sapphires are not listed on the website; they are brought out of the vault for an appointment, shown under daylight and incandescent light with their reports and provenance, and filmed unedited in our office like every Byrex stone.

Can a Madagascar sapphire be mistaken for Kashmir?

The velvety blues from Madagascar's Bemainty deposit come closest, which is why laboratories studied them carefully after 2016. Inclusions and trace-element chemistry separate the two in most cases, and where they do not a careful laboratory states the origin as inconclusive rather than Kashmir.

Further reading

Byrex Gems, 27 Queen Street East, Suite 407, Toronto. Coloured gemstones and natural fancy colour diamonds for the trade since 1988, and for private clients by appointment.

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