Is charoite dyed?
Charoite, a lilac mineral from Russia, has no known enhancements, per the gem society. What GIA records as dyed is the imitation: heated, dyed beryl and quartz.
Not on the record. The International Gem Society says charoite has no known enhancements, and gives SG 2.54 to 2.78. What GIA’s Gems & Gemology (Winter 2000) records as dyed is the imitation: massive beryl with intergrown quartz, heated and dyed to look like charoite, and found by dye concentrated in its fractures.
In short
- Charoite itself: no known enhancements. That is the International Gem Society charoite article’s sentence, and it adds that there are no known synthetic or lab-created charoites. No fetched source records dyed charoite. The September 2026 IMA-CNMNC Master List lists charoite as a species, status A, 1977-019, Russia; IGS says the gem material is a rock almost purely composed of it.
- What was dyed: beryl and quartz. McClure and Smith, Gems & Gemology, Winter 2000 report that Dominique Robert of Switzerland used heat, to increase porosity and so colour penetration, and dye to turn massive beryl with intergrown quartz into imitations of charoite and sugilite, as well as turquoise and coral. The treatment was readily identifiable by the presence of dye concentrations in the fractures.
- The imitation-not-treatment rule. On these sources, finding dye on a purple stone sold as charoite means it is probably not charoite at all. Ask what was dyed. The general way dye sits in fractures is on how to tell if a crystal is dyed; this page does not repeat it.
- Documented failure: the balance. At IGS’s SG 2.54 to 2.78, a 20.00 g charoite reads 12.13 to 12.81 g in water. Beryl’s 12.40 to 13.27 g and quartz’s 12.45 g fall inside or across it. IGS says GIA’s two plastic-bearing simulants also had SG and RI within charoite’s range; hot-point testing found the plastic. Weighing cannot clear a piece.
- No Handbook sheet. The Handbook of Mineralogy charoite PDF returned HTTP 404 on 4 November 2026, so charoite’s numbers here are IGS’s, attributed. Beryl, quartz and sugilite numbers are from their Handbook sheets.
| Material | Source | Dyed or treated? | How it was found | SG or density; 20.00 g in water | Refractive index |
|---|---|---|---|---|---|
| Charoite | IGS charoite article | No known enhancements; no known synthetics | — | 2.54–2.78; 12.13–12.81 g | 1.550–1.559 |
| Massive beryl with intergrown quartz | GIA, G&G Winter 2000, p. 346 | Heated and dyed to imitate charoite and sugilite | Dye concentrations in the fractures | Beryl 2.63–2.97 (12.40–13.27 g); quartz 2.65 (12.45 g) | Beryl ω 1.567–1.610; quartz ω 1.544, ε 1.553 |
| Two plastic-bearing simulants | IGS, citing GIA | Manufactured; one marketed as Royal Russianite | Hot-point testing revealed plastic | Within charoite’s range (IGS) | Within charoite’s range (IGS) |
| Dyed quartzite, purple | GIA, G&G Winter 2000 | Dyed to imitate sugilite | Dye concentrations in the fractures and between grains (GIA, of such dyed gems) | — | — |
| Sugilite | Handbook sugilite sheet; IMA list | Not recorded as dyed in these sources; itself imitated | — | 2.74–2.79; 12.70–12.83 g | ω 1.595–1.611, ε 1.590–1.607 |
Is charoite dyed or natural?
Untreated, as far as the fetched sources record. The International Gem Society’s charoite article says there are no known enhancements for charoites and no known synthetic or lab-created charoites. It describes the colour as coming from the dominant charoite mineral, purple and variable even within one specimen, with swirls from fibrous crystals in interlocking patterns, and mixed minerals including orange tinaksite, pale greenish grey microcline and greenish black aegirine-augite.
A rock named for its mineral. IGS says the gem material we call charoite is actually a rock, almost purely composed of the mineral charoite, like lapis lazuli; that comparison is on is lapis lazuli a mineral or rock. The IMA list has charoite as a species, (K,Sr,Ba,Mn)15-16(Ca,Na)32[Si70(O,OH)180](OH,F)4·nH2O, status A, 1977-019, country Russia; IGS’s panel gives the simpler K(Ca,Na)2Si4O10(OH,F)·H2O. A whole-word scan of the IMA list finds no row for charoitite or lilac stone. IGS gives the only source as the Chara River area, Murun Massif, Sakha Republic, Russia, and says lilac stone was found there in the 1940s.
What gets dyed to look like charoite? The GIA record
Beryl and quartz. McClure and Smith’s review of 1990s enhancements, in GIA’s Gems & Gemology for Winter 2000, says that using a combination of heat, to increase porosity and thus colour penetration, and dye, Dominique Robert of Switzerland turned massive beryl with intergrown quartz into imitations of ornamental materials such as charoite and sugilite, as well as turquoise and coral. It cites a 1992 Gem News item on dyed massive beryl and quartz resembling ornamental gems. It adds: as is the case with most dyed stones, the treatment was readily identifiable by the presence of dye concentrations in the fractures.
The imitation-not-treatment rule. So on the record, a dyed stone sold as charoite is a dyed something else. Beryl is the species of aquamarine; quartz is the species page quartz. The same review records purple dyed quartzite imitating sugilite. The colour-distribution check that finds dye is on how to tell if a crystal is dyed, and the broader fakes question on how to tell if a crystal is fake.
Can you tell dyed imitation charoite by weight or refractive index?
Not by weight. IGS gives charoite SG 2.54 to 2.78, so a 20.00 g piece reads 12.13 to 12.81 g in water. On the Handbook sheets beryl is 2.63 to 2.97 (12.40 to 13.27 g) and quartz 2.65 (12.45 g), and both overlap charoite’s range. IGS says GIA’s two plastic-bearing simulants also fell within charoite’s SG and RI. Method on how to measure specific gravity at home.
Refractive index narrows it, but not cleanly. IGS’s charoite RI is 1.550 to 1.559. Beryl’s lowest index on its sheet, 1.565, is 0.006 above charoite’s top, but quartz reads ω 1.544 and ε 1.553, so a beryl-and-quartz piece can give a reading inside charoite’s range. On these numbers no single reading proves a piece is charoite; the record’s identifying feature was the dye in the fractures. Hot-point and solvent tests are destructive and are not described here; this is not advice, and chemical hazards route to toxic minerals in a collection.
Is charoite a quartz?
No. The IMA list gives charoite its own row, a potassium, calcium and sodium silicate with strontium, barium and manganese, and quartz a separate row, SiO2. IGS gives charoite hardness 5 to 6 and RI 1.550 to 1.559; the quartz sheet gives hardness 7 and ω 1.544, ε 1.553. Quartz does appear in the story, but as part of the dyed imitation, not as charoite. The mineral-versus-rock distinction is on crystal vs mineral: what is the difference.
What IGS says about wear. It calls charoite tough in tenacity, with hardness 5 to 6, fair to good cleavage, splintery fracture and heat sensitivity. This page gives no care routine. More guides are in the collecting guides. We hold no catalogue and nothing here is offered for sale; the wanted list is the only commercial route.