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RM1688   Aluminite

Csordakúti Mine, Bicske-Zsámbéki Basin, Bicske-Csordakút, Fejér Co., Hungary

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.

 

RM1686   Mellite and calcite

Csordakúti Mine, Bicske-Zsámbéki Basin, Bicske-Csordakút, Fejér Co., Hungary

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
Price: 45 €Buy
 

RM1687   Mellite and calcite

Csordakúti Mine, Bicske-Zsámbéki Basin, Bicske-Csordakút, Fejér Co., Hungary

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
Price: 50 €Buy
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RM1361   Opal-AN, var. Hyalite with aragonite

Tarcal Colas Északkő quarry, Kopasz-Fekete Hills, Zemplén Mts., Tarcal, Borsod-Abaúj-Zemplén, Hungary

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


 

RM1359   Opal-AN, var. Hyalite on andesite

Tarcal Colas Északkő quarry, Kopasz-Fekete Hills, Zemplén Mts., Tarcal, Borsod-Abaúj-Zemplén, Hungary

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


 

RM1362   Opal-AN, var. Hyalite on andesite

Tarcal Colas Északkő quarry, Kopasz-Fekete Hills, Zemplén Mts., Tarcal, Borsod-Abaúj-Zemplén, Hungary

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


 
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