FMF - Friends of Minerals Forum, discussion and message board

[José Miguel]

Opacity in Quartz. This is a very etched Elestial Quartz from Minas Geraes, Brazil

[José Miguel]

Quartz from Diamantina, Minas Geraes, Brazil. 2001.

[José Miguel]

Quartz with Albite.
Lavra do Sapo, Conselheiro Pena, Minas Geraes, Brazil.

[José Miguel]

Perfect clarity in an alpine Smoky Quartz. But... it comes from Diamantina!, Minas Geraes, Brazil. 2007.

[José Miguel]

Citrine Quartz DT from Minas Geraes, Brazil,

[José Miguel]

Citrine Quartz from Minas Geraes, Brazil. 2004.

[José Miguel]

Citrine Quartz from Minas Geraes. Brazil. 2001.

[José Miguel]

Quartz from Minas Geraes, Brazil.

[José Miguel]

Inner clarity in this Citrine Quartz from Minas Geraes, Brazil.

[José Miguel]

Are they different crystals? No, they aren't! The background is different; the crystal is the same crystal! The perfect transparency of the crystal works the miracle.
Smoky Quartz from Diamantina, Brazil.

[Carles Millan]

[José Miguel]

Thank you very much, Carles.

Now, another superclear quartz from Minas Geraes, Brazil.

[José Miguel]

Fluorite. Shangbao. Hunan. China. 2007

[José Miguel]

Calcite with inclusions beside Old Natural Elements (pseudo-fossilized)
Origin of the Calcite: Guandong. Chine. 2007.
Origin of the Old Natural Elements: Unknown.

[José Miguel]

Citrine Quartz. Jabuti mine, São Geraldo do Baixio, Doce valley, Minas Gerais, Southeast Region, Brazil.

[José Miguel]

Citrine Quartz from Kolumo, Zambia.
Maybe this kind of citrine quartz come from Iteshi-Teshi and they are sold in Kolumo.

[José Miguel]

Citrine Quartz. Urals, Russia.

[Luiz Menezes]

Olá José Miguel:

I would like to make some suggestions about the likely localities of your quartz specimens labelled as from "Minas Gerais":

- The "Elestial Quartz - 12.2 x 5.8 x 5.3 cm", the "Citrine Quartz DT - 12 x 4 x 4.7 cm", the "Citrine - 11.9 x 3.3 x 2.1 cm" and the "Citrine - 14.8 x 7.3 x 5.9 cm" might have come from the county of Itinga; I say this because the faces are not completely sharp and bright, and this is characteristic from the quartz found on the pegmatite district of Itinga/ Coronel Murta; I have bought and sold several lots of smoky quartz and citrines from that area and they all show this pattern (nice shapes and colors but not completely bright faces); the other pegmatite district that has produced large amounts of smoky quartz "elestials" (also called "alligator quartz") and citrines is the Conselheiro Pena/ Galiléia district, but on this district the quartz crystals are more frequently very sharp and bright (like happens on your specimen "Citrine - Jaboti mine - 7.2 x 4.9 x 2.6 cm"; Jaboti mine is located in São Geraldo do Baixio county, inside the Galiléia - Conselheiro Pena pegmatite district); any of the above listed 4 specimens may also have been found in Coronel Murta, that belongs to the same Itinga - Coronel Murta pegmatite district, but I have seen much more specimens like those coming from Itinga than from Coronel Murta on the past years.

- The "Citrine Quartz - 10.2 x 3.8 x 3 cm" came from the Barra do Salinas mine, Coronel Murta; the "cast" of light smoky quartz, with shades of darker color, growing over a light citrine or colorless or light smoky quartz crystal, is typical from that mine.

Regards

Luiz

[José Miguel]

Muito obrigado, Luiz.
The next crystal is another Citrine Quartz, from Minas Geraes, Brazil.
Do you think it comes from Galiléia - Conselheiro Pena pegmatite district? It is jacaré and very sharp, with very good luster.

[Luiz Menezes]

Olá José:

The citrine/"jacaré" looks to be from São Geraldo do Baixio; it was a district of Galiléia until about 10 years ago, when it was emancipated as a new county; most of the best "jacarés" (="alligator smoky quartz") found in Minas Gerais comes from São Geraldo do Baixio.

Luiz