The facts
What eudialyte-Bearing Agpaitic Rock actually is
Mineralogically, eudialyte-Bearing Agpaitic Rock is layered agpaitic nepheline syenite in which pink eudialyte forms the ornamental component, with black arfvedsonite and white feldspar — Eudialyte Na15Ca6(Fe,Mn)3Zr3SiO(Si25O73)(O,OH,H2O)3(Cl,OH)2 with nepheline, alkali feldspar and arfvedsonite, crystallising in the aggregate (eudialyte is trigonal) system.
The colour is caused by mn and Fe in eudialyte give raspberry to crimson pink; arfvedsonite supplies the black. That is worth knowing because it determines what heating, light and time can and cannot do to the stone.
A refractometer reads 1.59-1.64 (eudialyte), and the specific gravity sits near 2.70-3.10; cleavage is indistinct.
Where eudialyte-Bearing Agpaitic Rock comes from
The recognised sources are Kringlerne and Kvanefjeld, Ilimaussaq complex, Narsaq, Greenland - the classic kakortokite, Lovozero and Khibiny massifs, Kola Peninsula, Russia, Mont Saint-Hilaire, Quebec, Canada and Poços de Caldas, Minas Gerais, Brazil.
Origin affects price in this material, so we name the locality on every quote rather than the country. "African" or "Asian" tells a buyer nothing.
How eudialyte-Bearing Agpaitic Rock is treated
Untreated; often resin-stabilised for cutting because the rock is friable. HEALTH AND LEGAL: Ilimaussaq and Lovozero agpaitic rocks carry accessory steenstrupine, monazite and other thorium- and uranium-bearing minerals, and material from Kvanefjeld in particular can be measurably radioactive - dust control matters and some pieces should not be worn continuously. Greenland restricts collecting and export from the Kvanefjeld area, and Russia restricts Lovozero access. Check radioactivity before retailing.
None of this is a problem when it is said out loud. It becomes one the moment it is left out.
What eudialyte-Bearing Agpaitic Rock is confused with
The usual confusions are Rhodonite and rhodochrosite (pink, but different setting), Dyed composites and Sodalite syenite.
The separation is rarely a matter of opinion: refractive index 1.59-1.64 (eudialyte) and specific gravity 2.70-3.10 settle most of it in a minute, and magnification settles the rest.
What eudialyte-Bearing Agpaitic Rock is used for
Eudialyte-Bearing Agpaitic Rock is bought by mineral collecting, jewellery, decorative objects and architecture and interiors — and each of those trades wants a different form of the same material.
We quote each application in the unit that trade actually buys in, by the specimen, by the carat or by the piece.
Durability and care
Eudialyte-Bearing Agpaitic Rock is 5-6 on the Mohs scale, with indistinct cleavage.
Below about 5.5 a stone will be scratched by ordinary household dust, which is largely quartz. That does not make it unusable — it makes it a pendant, an earring or an object rather than a ring worn every day.
Warm water, mild soap and a soft brush. Avoid ultrasonic cleaners on anything fracture-filled, stabilised, dyed or visibly included.
What eudialyte-Bearing Agpaitic Rock costs
Indicative pricing for eudialyte-Bearing Agpaitic Rock is $5-40 per kilogram rough; cabochons $15-90; fine Greenlandic kakortokite slabs higher.
That is a range, not a quote. Colour, size, clarity, cut and origin move the figure a long way inside it, and the only honest price is one given against a specific stone. Send us what you need and we will price it.
Questions
Is eudialyte-Bearing Agpaitic Rock treated, and how?
Untreated; often resin-stabilised for cutting because the rock is friable. HEALTH AND LEGAL: Ilimaussaq and Lovozero agpaitic rocks carry accessory steenstrupine, monazite and other thorium- and uranium-bearing minerals, and material from Kvanefjeld in particular can be measurably radioactive - dust control matters and some pieces should not be worn continuously. Greenland restricts collecting and export from the Kvanefjeld area, and Russia restricts Lovozero access. Check radioactivity before retailing.
Where does eudialyte-Bearing Agpaitic Rock come from?
Kringlerne and Kvanefjeld, Ilimaussaq complex, Narsaq, Greenland - the classic kakortokite, Lovozero and Khibiny massifs, Kola Peninsula, Russia, Mont Saint-Hilaire, Quebec, Canada and Poços de Caldas, Minas Gerais, Brazil. Origin affects price, so we name the locality rather than the country on every quote.
Is eudialyte-Bearing Agpaitic Rock hard enough to wear every day?
Not really. At 5-6 on the Mohs scale it is softer than the quartz dust in ordinary household dirt, so it scratches with wear. It suits pendants, earrings and objects better than a daily ring.
How much does eudialyte-Bearing Agpaitic Rock cost?
Indicatively $5-40 per kilogram rough; cabochons $15-90; fine Greenlandic kakortokite slabs higher. Colour, size, clarity and origin move the price a long way within that, so treat it as a range and ask for a quote against a specific stone.
What is eudialyte-Bearing Agpaitic Rock confused with?
Most often Rhodonite and rhodochrosite (pink, but different setting), Dyed composites and Sodalite syenite. A refractive index of 1.59-1.64 (eudialyte) and a specific gravity near 2.70-3.10 separate it quickly.
What is eudialyte-Bearing Agpaitic Rock used for besides jewellery?
mineral collecting, decorative objects and architecture and interiors. Each of those trades buys it in a different form and a different unit.
Related stones
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Tell us the size, the quality and what it is for. We source it, photograph it and quote it — with the locality named.
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