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Fine Coloured Stones

Garnets

Garnet is a group rather than a single stone, and the members differ enough in colour and price that treating them as one category causes confusion. Almost all of them share one commercial advantage: they are not routinely treated.

Red · Purplish Red · Orange · Mandarin Orange · Green · Peach · Colour-change

Varieties

How garnets are categorised

Trade categories rather than gemological ones — these are the terms a requirement is normally written in.

Rhodolite
Purplish red to raspberry; the volume line, widely calibrated.
Spessartite
Orange to mandarin; vivid and strongly in demand.
Demantoid
Green andradite with exceptional dispersion. The premium member.
Colour-change Garnet
Shifts between daylight and incandescent light.
Almandine & Pyrope
Deep reds; the classic commercial garnets.
Malaya Garnet
Pink-orange to peach, between rhodolite and spessartite.

Garnets in detail

Specify the garnet, not just "garnet"

The price range across the group is very wide — commercial almandine and fine demantoid are not in the same market. A requirement that just says garnet cannot be quoted accurately, so name the member or describe the colour precisely.

Rhodolite and spessartite are the two most commonly bought for production. Both calibrate well and both are available in consistent quantity.

Demantoid and fine colour-change material are single-stone purchases and should be approached as searches.

The untreated advantage

Garnets are not routinely treated. For a brand whose positioning rests on natural, untreated material, the group offers real colour range without the disclosure complexity of corundum or emerald.

The exception to watch is that some material sold as garnet in low-cost channels is glass or composite. Buy through the trade and ask.

Treatment

Garnets are not routinely treated and no established treatment is in general commercial use across the group. We record disclosure per stone as standard.

This describes the market for the species. It is not a statement about any individual stone — disclosure for a specific stone comes from that stone’s own record and documentation. More on laboratory reports.

Buyer questions

Buying garnets

Which garnet is best for a production run?
Rhodolite and spessartite. Both calibrate reliably, both are available in quantity, and both hold colour well in small sizes.
What is mandarin garnet?
A trade term for strongly saturated orange spessartite. It is a colour description rather than a separate species, so it is worth agreeing against an image.