Rosell Minerales

These specimens come from an andesite quarry located in NE Hungary. This quarry is worked by Colas Északkő Co. In year 2013, hyaline beautiful specimens of opal were collected. In the quarry explosives are used to excavate the rocks, so most of the specimes dissapears. From summer 2015 access is not permitted, but some specimens were collected before... These facts make it difficult to see good samples of this quality.
Hyalite opal (opal-AN) aggregates (crown shaped) are completely transparent, like drops of water, with an exceptional brightness. They are highly fluorescent under shortwave UV and also under longwave. Sometimes they accompanied by globular aggregates of calcite-aragonite. They are disposed very aerial on a porous matrix of andesite.

Size: 6.9 x 6.3 x 4.4 cm.
Found in ±2015.

Fluorescent under LW-UV and SW-UV lights

These specimens come from an andesite quarry located in NE Hungary. This quarry is worked by Colas Északkő Co. In year 2013, hyaline beautiful specimens of opal were collected. In the quarry explosives are used to excavate the rocks, so most of the specimes dissapears. From summer 2015 access is not permitted, but some specimens were collected before... These facts make it difficult to see good samples of this quality.
Hyalite opal (opal-AN) aggregates (crown shaped) are completely transparent, like drops of water, with an exceptional brightness. They are highly fluorescent under shortwave UV and also under longwave. Sometimes they accompanied by globular aggregates of calcite-aragonite. They are disposed very aerial on a porous matrix of andesite.

Size: 4.4 x 3.8 x 3.2 cm.
Main crystal: 2.4 x 2 cm. aggreg.
Found in ±2015.

Fluorescent under LW-UV and SW-UV lights

These specimens come from an andesite quarry located in NE Hungary. This quarry is worked by Colas Északkő Co. In year 2013, hyaline beautiful specimens of opal were collected. In the quarry explosives are used to excavate the rocks, so most of the specimes dissapears. From summer 2015 access is not permitted, but some specimens were collected before... These facts make it difficult to see good samples of this quality.
Hyalite opal (opal-AN) aggregates (crown shaped) are completely transparent, like drops of water, with an exceptional brightness. They are highly fluorescent under shortwave UV and also under longwave. Sometimes they accompanied by globular aggregates of calcite-aragonite. They are disposed very aerial on a porous matrix of andesite.

Size: 5.8 x 4.6 x 2.3 cm.
Found in ±2015.

Fluorescent under LW-UV and SW-UV lights

Bolivarite is a very rare aluminium phosphate, related to evansite. In this specimen white bolivarite is filling vugs of a limonite matrix. This mineral was found as crusts and as a filling of cracks in some granitic rocks a few km from Pontevedra (Spain), on the road to Campo Lameiro. Its discoverers, Fernandez Navarro and Castro Barea, named it as a tribute to the eminent Spanish entomologist, exiled in Mexico after the Spanish Civil War, Ignacio Bolivar y Urrutia.

Size: 3.3 x 2.2 x 2.1 cm.

Close to the mellite species, aluminite specimens from this Hungarian mine are a classic of the ancient European mineralogy. There present nodules with orange ocher tones due to iron minerals, but the interior of them shows us a snowy white sugar texture. This mineral occurs in many locations, but in a few with this richness.

Size: 8.5 x 7.0 x 2.6 cm.

Mellita, also called xylocriptite or honeystone, is an organometallic compound. It is an aluminum salt of the melitic acid; that is, an aluminum benzene-hexacarboxylate hydrate with a chemical formula Al2C6(COO)6·16H2O. This is a rare rare secondary mineral in lignite deposits. In this sample we can observe rich facets and transparence. Nice specimen. Fluorescent under SW-UV.

Size: 5.0 x 3.8 x 3.0 cm
Main crystal: 14 x 10 mm.

Fluorescent under short wave UV

Mellite, also called xylocriptite or honeystone, is an organometallic compound. It is an aluminum salt of the melitic acid; that is, an aluminum benzene-hexacarboxylate hydrate with a chemical formula Al2C6(COO)6·16H2O. This is a rare rare secondary mineral in lignite deposits. In this sample we can observe rich facets and transparence. Nice specimen. Fluorescent under SW-UV.

Size: 5.3 x 4.5 x 3.5 cm.
Main crystal: 18 x 10 mm

Fluorescent under short wave UV

These specimens come from an andesite quarry located in NE Hungary. This quarry is worked by Colas Északkő Co. In year 2013, hyaline beautiful specimens of opal were collected. In the quarry explosives are used to excavate the rocks, so most of the specimes dissapears. From summer 2015 access is not permitted, but some specimens were collected before... These facts make it difficult to see good samples of this quality.

Hyalite opal (opal-AN) aggregates (crown shaped) are completely transparent, like drops of water, with an exceptional brightness. They are highly fluorescent under shortwave UV and also under longwave. Sometimes they accompanied by globular aggregates of calcite-aragonite. They are disposed very aerial on a porous matrix of andesite.

Size: 8.2 x 7.8 x 4.0 cm.
Found in 2015.

Fluorescent under LW-UV and SW-UV lights

These specimens come from an andesite quarry located in NE Hungary. This quarry is worked by Colas Északkő Co. In year 2013, hyaline beautiful specimens of opal were collected. In the quarry explosives are used to excavate the rocks, so most of the specimes dissapears. From summer 2015 access is not permitted, but some specimens were collected before... These facts make it difficult to see good samples of this quality.

Hyalite opal (opal-AN) aggregates (crown shaped) are completely transparent, like drops of water, with an exceptional brightness. They are highly fluorescent under shortwave UV and also under longwave. Sometimes they accompanied by globular aggregates of calcite-aragonite. They are disposed very aerial on a porous matrix of andesite. AMAZING specimen!

Size: 6.5 x 5.5 x 4.0 cm.
Main crystal: 30 x 28 mm.
Found in 2015.

Fluorescent under LW-UV and SW-UV lights

These specimens come from an andesite quarry located in NE Hungary. This quarry is worked by Colas Északkő Co. In year 2013, hyaline beautiful specimens of opal were collected. In the quarry explosives are used to excavate the rocks, so most of the specimes dissapears. From summer 2015 access is not permitted, but some specimens were collected before... These facts make it difficult to see good samples of this quality.

Hyalite opal (opal-AN) aggregates (crown shaped) are completely transparent, like drops of water, with an exceptional brightness. They are highly fluorescent under shortwave UV and also under longwave. Sometimes they accompanied by globular aggregates of calcite-aragonite. They are disposed very aerial on a porous matrix of andesite.

Size: 6.8 x 4.7 x 3.0 cm.
Found in 2015.

Fluorescent under LW-UV and SW-UV lights