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NA70AN2: Quartz (variety amethyst) with Siderite
Druse of Quartz crystals (amethyst variety) with a very short prism, translucent, with good luster and a pale magenta-violet color, partially covered by small groups of Siderite crystals. This piece comes from the Miguel David Martínez collection (number 603) whose label we will send to the buyer. Of exceptional quality for the locality.
San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia)  Spain
Specimen size: 19.4 × 13.4 × 7.8 cm = 7.64” × 5.28” × 3.07”
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NZ58M9: Quartz (variety amethyst) with smoky Quartz
Sceptered crystal with stepping. It has a very sharp phantom and its color, very deep, is especially concentrated on terminal faces.
Mas Sever Quarry, Massabè (Mas Ceber), Sils, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya  Spain (2005)
Specimen size: 4.2 × 2.1 × 2.7 cm = 1.65” × 0.83” × 1.06”
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NX16K7: Quartz (variety amethyst) with smoky Quartz and Microcline
Parallel and scepter growth of doubly terminated crystals with short prisms, deep and uniform color. On Albite and Microcline matrix.
Mas Sever Quarry, Massabè (Mas Ceber), Sils, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya  Spain (2006)
Specimen size: 5 × 3.8 × 3.8 cm = 1.97” × 1.50” × 1.50”
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NB88M9: Quartz (variety amethyst) with smoky Quartz and Microcline
The crystal, of big size, has clearly a violet color but at the same time has a core of neat smoky color with golden shades. The base is a flat contact.
Mas Sever Quarry, Massabè (Mas Ceber), Sils, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya  Spain (2001)
Specimen size: 13.5 × 9.2 × 8.2 cm = 5.31” × 3.62” × 3.23”
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ND9M9: Quartz (variety amethyst) with smoky Quartz, Albite and Microcline
A curious sample in which coincide two Quartz varieties (Smoky and amethyst). On the thicker crystal there is a very well defined phantom and the violet color on terminal faces. With Albite and on an Microcline matrix.
Soliva Quarry (AVE Quarry works), Can Sala, Riudarenes, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya  Spain (2006)
Specimen size: 4.9 × 4.8 × 3.8 cm = 1.93” × 1.89” × 1.50”
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1N63: Quartz (variety amethyst), Albite
Parallel and scepter growths of doubly terminated crystals with short prisms, deep and uniform color on Albite matrix. The specimen has a contact on one of the faces of the main crystal.
Soliva Quarry (AVE Quarry works), Can Sala, Riudarenes, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya  Spain (2006)
Specimen size: 4.0 × 6.2 cm = 1.57” × 2.44”

Main crystal size: 3.6 × 3.0 cm = 1.42” × 1.18”
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2M09: Quartz (variety amethyst), Calcite
Crystals and groups of crystals, some of them doubly terminated, very transparent, bright and of a very uniform color, on globular Calcite and matrix. The Quartz exhibits good transparency. The sample is from a recent find on May 1, 2008.
Capurru Quarry, Osilo, Sassari Province, Sardinia/Sardegna  Italy (01/05/2008)
Specimen size: 4.2 × 3.3 × 1.7  cm = 1.65” × 1.30” × 0.67”
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3N58: Quartz (variety amethyst), Quartz (variety smoky)
Crystals in parallel growth on a base of smoky Quartz. The crystals are transparent, bright and have a good deep color with zoning. Two of the crystals show contacts on their terminations.
Mas Sever Quarry, Massabè (Mas Ceber), Sils, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya  Spain (10/2004)
Specimen size: 5.3 × 7.2 cm = 2.09” × 2.83”
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9MY17Q1: Quartz (variety amethyst), Quartz (variety smoky), Microcline
Very esthetic Group, with parallel growths and very deep color especially concentrated on the zones near the edges. This type of pieces, in this deposit, correspond in origin to myarolytic cavities, so small cavities within a granitic rock where pneumatolytic minerals has developed, Quartz in this case.
Soliva Quarry (AVE Quarry works), Can Sala, Riudarenes, Comarca La Selva, Gerona / Girona, Catalonia / Catalunya  Spain (2005)
Specimen size: 10.5 × 7.0 × 4.0 cm = 4.13”
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TR14AM2: Quartz (variety chalcedony)
Coralloid growth, very aerial and aesthetic, of Quartz, chalcedony variety. Translucent and uniform white in color.
Barra de Salinas, Coronel Murta, Jequitinhonha, Minas Gerais  Brazil
Specimen size: 14.8 × 3.3 × 3.3 cm = 5.83” × 1.30” × 1.30”
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EA13AE2: Quartz (variety chalcedony)
Floater aggregate with very aerial spheroidal forms that are translucent with a very deep uniform lilac color. We note, aside from the color, the elegance of the sample, uncommon for chalcedony.
Mamuju area, Sulawesi Barat Province  Indonesia (2016)
Specimen size: 4.2 × 2.5 × 2 cm = 1.65” × 0.98” × 0.79”
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EC6AE2: Quartz (variety chalcedony)
Floater aggregate with very aerial spheroidal forms that are translucent with a very deep uniform lilac color. We note, aside from the color, the elegance of the sample, uncommon for chalcedony.
Mamuju area, Sulawesi Barat Province  Indonesia (2016)
Specimen size: 4.3 × 2.9 × 1.9 cm = 1.69” × 1.14” × 0.75”

Main crystal size: 0.3 × 0.3 cm = 0.12” × 0.12”
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EE66AE2: Quartz (variety chalcedony)
Aggregate, on matrix, with very aerial spheroidal forms that are translucent and have a very intense and uniform lilac color. We note, aside from the color, the fineness and the elegance of the simple, uncommon for the chalcedony.
Mamuju area, Sulawesi Barat Province  Indonesia (2016)
Specimen size: 11.5 × 5.9 × 6.2 cm = 4.53” × 2.32” × 2.44”
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HM80EF: Quartz (variety chalcedony)
Floater nodule (fossil sponge) of Quartz (chalcedony variety) with spheroidal shapes, translucent and with zones of dark brown color and other areas more whitish.
Smara  Morocco (Western Sahara) (2016)
Specimen size: 6.1 × 5.2 × 3.4 cm = 2.40” × 2.05” × 1.34”
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EP61AE1: Quartz (variety chalcedony)
A floater nodule with blackish spheroidal forms and whitish areas with some visible crystalline forms. The sample, a silicified fossil sponge, mainly retains the original morphology of this biological specimen.
Smara  Morocco (Western Sahara) (2016)
Specimen size: 5.3 × 5.2 × 4.7 cm = 2.09” × 2.05” × 1.85”
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ER62AE1: Quartz (variety chalcedony)
A floater nodule with blackish spheroidal forms and whitish areas with some visible crystalline forms. The nodule is a result of sponge silica fossilization.
Smara  Morocco (Western Sahara) (2016)
Specimen size: 5.5 × 4.9 × 5.6 cm = 2.17” × 1.93” × 2.20”
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TC2230NRD: Quartz (variety chalcedony) after Baryte
Microcrystalline Quartz (chalcedony variety), which has completely pseudomorphed an aggregate of tabular Baryte crystals. The specimen comes from the Miguel David Martínez collection (number 601), whose label we will send to the buyer.
San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia)  Spain
Specimen size: 16 × 12 × 6.8 cm = 6.30” × 4.72” × 2.68”
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TC2230NMN: Quartz (variety citrine and smoky)
Very aerial group of transparent, lustrous Quartz crystals with darker tones at the base (smoky variety) and yellow tones at the top. The specimen comes from the Miguel David Martínez collection (number 844), whose label we will send to the buyer.
Ambatofinandrahana District, Amoron'i Mania Region  Madagascar (±2020)
Specimen size: 10.4 × 8.8 × 7.4 cm = 4.09” × 3.46” × 2.91”

Main crystal size: 9.4 × 1.6 cm = 3.70” × 0.63”
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NJ8N1: Quartz (variety citrine quartz)
Transparent crystal, very uniform, natural citrine color and sectorial color zoning on terminal faces with an enlargement of one of the rhombohedron faces. A Spanish classic.
Cotorro Creek, Villasbuenas, Comarca La Ramajería, Salamanca, Castile and León  Spain (08/2004)
Specimen size: 4 × 1.5 × 1.9 cm = 1.57” × 0.59” × 0.75”
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NM58N5: Quartz (variety citrine quartz)
Transparent crystal, very uniform, natural citrine color and sectorial color zoning on terminal faces. A Spanish classic.
Cotorro Creek, Villasbuenas, Comarca La Ramajería, Salamanca, Castile and León  Spain (08/2004)
Specimen size: 3.5 × 2.9 × 2 cm = 1.38” × 1.14” × 0.79”

Main crystal size: 4.2 × 1.1 cm = 1.65” × 0.43”
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MC60H1: Quartz (variety citrine quartz)
The definition of the crystals, free of damage, is perfect. Its yellow color is not very intense but is uniform and clearly visible. The specimen is from a recent find in a classic Spanish mine, very well known in the past by its natural citrine Quartz, but where no significant samples had been found for a very long time.
Cotorro Creek, Villasbuenas, Comarca La Ramajería, Salamanca, Castile and León  Spain (09/2005)
Specimen size: 6.2 × 3 × 3.3 cm = 2.44” × 1.18” × 1.30”
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TC260NK: Quartz (variety citrine)
Transparent crystal, with a good natural citrine color, very uniform. A Spanish classic.
Amistad Mine, Villasbuenas, Comarca La Ramajería, Salamanca, Castile and León  Spain (08/2004)
Specimen size: 4.4 × 2.1 × 2 cm = 1.73” × 0.83” × 0.79”
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TC180NG: Quartz (variety citrine)
Quartz crystal, citrine variety, with sharp crystal forms, transparent, with a very bright luster and intense color (natural, not obtained by treatment). With a small ding on one of the back faces, in perfect condition on the rest of the crystal.
Mamapa, Nampula Province  Mozambique (2016)
Specimen size: 6.6 × 4.5 × 4.1 cm = 2.60” × 1.77” × 1.61”
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3E98: Quartz (variety citrine)
Very elongated Quartz variety citrine crystal, with a highly developed prism, with re-crystallizations at the base, with a very transparent termination with a delicate zoning tending towards citrine (natural color) at the tip.
Olkhovka, Tyumen Oblast  Russia (05-06/2012)
Specimen size: 13.2 × 5.0 × 3.6 cm = 5.20” × 1.97” × 1.42”
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EC87AE5: Quartz (variety citrine)
Quartz crystals in parallel growth with very well defined faces and edges, transparent and bright, with inclusions, and with an intense yellow color that has areas of different color intensities and shades.
Olkhovka, Tyumen Oblast  Russia (05-06/2010)
Specimen size: 11.5 × 3.5 × 2.7 cm = 4.53” × 1.38” × 1.06”

12689 results found. 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