ferrierite page

Selection of images from my collection. © Fernando Metelli. All photos and other material on this site are copyright, if you wish to use them please contact me for permission

I prepare this page with pieces from the well known Italian place of Monastir, where an andesitic rock hosts geodes and fractures with volcanic minerals.
The most represented mineral is Ferrierite-Mg (it is worth to remember that the generic terms Ferrierite refers to a group of minerals)

	Analcime Semi-transparent XX up to 2.2cm wide, on the basaltic matrix 14x11cm Monte Oladri quarries, Monastir, Cagliari. Italy Specimen n.49 Another photo: entire piece
	Analcime Transparent bright XX, up to 20.7cm wide, with lamellar calcite 14x11cm Monte Oladri quarries, Monastir, Cagliari. Italy Specimen n.30
	Cabazite Yellowish XX, edge up to 0.2cm, on the matrix with small transparent analcime 8x8cm Ugas quarry, Monastir, Cagliari. Italy Specimen n.200 Another photo: entire piece
	Calcite Perfect X of calcite, edge 1.4 cm, posted on top of a black portion of rock 6.5x4cm Ugas quarry, Monastir, Cagliari. Italy Specimen n.1319
	Calcite Semitransparent XX, edge up to 2cm, on a matrix covered by small X of heulandite 7x7cm Monastir, Cagliari. Italy Specimen n.1209 anoter photo: a different view
	Ferrierite-Mg This photo shows the typical spherical divergent radiating aggregates of bladed ferrierite-mg XX. This group of intergrown balls - the bigger is 1 cm wide- stand on a carpet of white mordenite, surrounded by calcite brown XX (around 0,2cm). You can see also the image of the entire piece, where a lot of ferrierite balls are in a cavity of the volcanic rock 15x14cm Mt Olladri quarries, Monastir, Cagliari. Italy Specimen n.776 Another photo: entire piece
	Ferrierite-Mg Detail of 776 specimen. Bigger view of previous photo: the cavity with Ferrierite balls. mordenite flowers are evident in the lower and upper part of the image
	Ferrierite-Mg Detail of 776 specimen. On the back of same piece in the previous picture, there is this fine group of ferrierite balls (2.5 cm long), with well defined thin XX and yellow color
	Ferrierite-Mg Two balls, 0.8cm wide, standing closed to a pearly, semitransparent "heulandite" X, 1cm long ("heulandite" refers to a group of minerals, but I do not have the knowledge to make a distinction). On this piece there are others ferrierite, up to 1.5cm wide 15x12 Mt Olladri quarries, Monastir, Cagliari. Italy Specimen n.777 Another photo: a bigger view
	Detail of 777 specimen. The ball (under the sunlight) is 0.8 cm wide
	Detail of 777 specimen. 1.5cm wide, the surface of the broken ball is covered by Mordenite
	Detail of 777 specimen. It is 0.7cm wide, it is evident the different color from center to external
	Ferrierite-Mg Dark orange aggregate of ferrierite, with "heulandite"XX up to 1cm long. This piece is covered by a lot of "heulandite" XX, as it is possible to see from the other photo 16x12cm Mt Olladri quarries, Monastir, Cagliari. Italy Specimen n.46 Another photo: entire piece
	"Heulandite" Specimen detail: orange small XX in a cavity 8x5cm Monte Oladri quarries, Monastir, Cagliari. Italy Specimen n.572