WPAN-08/115 - Calcite, quartz and siderite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

A 6x2-cm. long crystal of lustrous colorless transparent quartz has a rhombic crystal of siderite attached about 7 cm. across partly seen through the quartz. The siderite crystal is completely coated by a parallel growth (probably epitactic) of small lustrous greyish crystals of calcite that also coat some faces of the quartz. There is a scattering of tiny golden crystals of marcasite on the quartz crystal and areas of the calcite coating. Quite clean of damage with only a cleaved crystal of siderite at back. Very interesting.

8.7x8.3x4.9 - Sold

WPAN-08/122 - Chalcopyrite and siderite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Large mass of lustrous golden chalcopyrite crystals with most of the surface of a darker color due to a microscopic mixture of chalcopyrite and sphalerite. Bottom is coated by tan prismatic hexagonal crystals of siderite to about 9 mm. with a scattering of tiny golden cubic pyrite crystals. Quite clean of damage, I think that the golden areas are natural but can not be completely sure.

10x8.5x5.8 - 95 €

WPAN-08/113 - Quartz and siderite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Lustrous transparent crystal of quartz with the back side coated by zoned tan colored tabular hexagonal crystals of siderite to 8 mm. across. Almost hidden between the siderite crystals there are a couple of composite greyish crystals of apatite. Minor bruising on an area of the siderite coating and a small ding on one edge of the quartz.

8x4x3.5 - 30 €

WPAN-08/110 - Dolomite and quartz

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

White rhombic crystals of dolomite to about 1 cm. across are coating a cluster of quartz crystals partly seen below the dolomite. The reddish color is probably due to a thin layer of oxides below the surface of the dolomite. The visible quartz areas are also coated by a mixture of crystallized creamy siderite, white calcite and lustrous golden pyrite cubes, all of them to about 1 mm. Undamaged.

7.4x5x5.2 - 50 €

WPAN-08/109 - Dolomite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Cluster of white curved crystals of dolomite to abut 1.2 cm. across with some silvery muscovite,small green apatite crystals and transparent brown turmaline needles associated at bottom. Dolomite is undamaged but most of the small apatite crystals are not completed.

6.5x5.4x3 - 20 €

WPAN-08/93 - Ferberite and siderite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Lustrous black ferberite crystal with a coating of thin tabular hexagonal crystals of tan siderite to about 5 mm. across at back and sides. Undamaged although a minor crystal of ferberite at back is cleaved.

4x3.1x2 - 20 €

WPAN-08/120 - Galena and siderite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Heavy mass of crudely crystallized galena with molten appearance and small faces here and there partly coated by prismatic hexagonal tan crystals of siderite to about 5 mm. The galena mass has grown around a core of lustrous golden massive chalcopyrite. Quite clean of damage with only a couple of small cleaved spots. Galena of any kind is always a rare mineral found at Panasqueira, being crystallized this is a great addition to any collection of Panasqueira specimens.

8.5x6.5x5 - 70 €

WPAN-08/117 - Muscovite, siderite and apatite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Floater cluster of muscovite crystals, almost black on surface but silvery and lustrous where the inner structure of the cluster is seen with a partial coating of creamy tabular hexagonal crystals of siderite to about 7 mm. across. There are a few light green lustrous translucent crystals of apatite to about 7 mm. here and there. Undamaged, the areas where the muscovite cluster is not completed are old and natural (small siderite crystals can be seen growing there).

8.5x6.3x5 - 60 €

WPAN-08/107 - Siderite, turmaline and arsenopyrite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Cluster of tan hexagonal tabular to short prismatic crystals of siderite to 2.5 cm. across (although most are smaller) with some pieces of turmaline-coated matrix at bottom. Turmaline appears as very thin lustrous needles everywhere at bottom and here and there on the siderite. Also at bottom there are masses of small crystals of mucovite and grey crystals of arsenopyrite with epitactic overgrowths of marcasite in some areas. The siderite crystals show a scattering of tiny golden crystals of marcasite and probably some arsenopyrite. Quite clean of damage.

9.5x6.8x4.7 - 55 €

WPAN-08/104 - Siderite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Cluster of creamy tabular hexagonal crystal of siderite to about 1 cm. across with small tarnished crystals of arsenopyrite, transparent green crystals of apatite and needles of turmaline at bottom. Minor cleaving at the edges of the specimen.

8x6x2.8 - 45 €

WPAN-08/99 - Siderite and apatite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Loose tan colored rhombic crystal of siderite with a few small apatite crystals to 3 mm. across attached and a dusting of golden marcasite. One edge shows minor contacting, otherwise undamaged.

3.8x3.8x2.5 - 18 €

WPAN-08/98 - Siderite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Loose tan colored rhombic crystal of siderite with a dusting of golden marcasite on some areas (there is even a 2 mm. crystal). There is some contacting with a previous quartz crystal as seen on the pictures and a small area peeled off as only damage.

4x3.6x2.7 - 15 €

WPAN-08/105 - Siderite and apatite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Nice cluster of tan disc-shaped crystals of siderite to 3 cm. across with a silky luster with a little piece os matrix attached. There are some lustrous dark green hexagonal crystals of apatite to about 5 mm. across in some areas of the specimen and small needles of turmaline on the matrix piece. A couple of apatite crystals (one at back) shows minor damage, otherwise undamaged and quite interesting.

5.7x3.3x2.9 - 35 €

WPAN-08/101 - Siderite and arsenopyrite

Barroca Grande Mine, Panasqueira, near Silvares (Fundao, Portugal)

Matrixless cluster of tan colored rhombic crystals of siderite to 5 cm. across with a metallic grey to golden (probably due to a thin layer of epitactic marcasite) 3-cm. long crystal or arsenopyrite at back and minor silvery muscovite. One of the smaller siderite crystals has some cleaving which allows to appreciate the darker color of the core as is typical in siderites from Panasqueira.

5.8x4.5x4.2 - 30 €