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Prase (Prasem)

Pictures (77 Images total)

Prasem
Views (Image: 1348766068): 4411, Rating: 9.57
Prasem

mit Hämatit, Bildhöhe 5 cm, Fundort Serifos, Griechenland

Collection: berthold
Copyright: berthold
Contribution: berthold 2012-09-27
Prase Quartz - Amethyst
Views (Image: 1463696310): 6707, Rating: 9.6
Prase Quartz - Amethyst

Specimen = 85 mm; Serifos; Greece

Collection: Andreas Schmid
Copyright: Andreas Schmid
Contribution: Andreas Schmid 2016-05-20
Prase Quartz
Views (Image: 1463696163): 1655, Rating: 9.5
Prase Quartz

showing the inner life with needles of Acthinolite; Specimen = 74 mm; Serifos; Greece

Collection: Andreas Schmid
Copyright: Andreas Schmid
Contribution: Andreas Schmid 2016-05-20
Prasem
Views (Image: 1499709698): 453
Prasem

Perfect quality, finished all around, prase quartz specimen, from Serifos Island, Kykládes Prefecture, Aegean Islands Department, Greece; Size 75 х 56 х 42 mm

Copyright: pegmatite
Contribution: pegmatite 2017-07-10
Prasem
Views (Image: 1180466025): 3153, Rating: 8.83
Prasem

Prasem-Kristalle auf Aktinolith-Matrix mit Eisenrosen, Serifos, Griechenland. Bildhöhe: 9,5 cm.

Collection: aca
Copyright: aca
Contribution: aca 2007-05-29
Prasem xx mit Hämatit
Views (Image: 1257358807): 3778
Prasem xx mit Hämatit

Stufenbreite ca. 12 cm, Fundort: Serifos, Kykladen, Griechenland

Collection: berthold
Copyright: Archiv: Berthold Weber (berthold)
Contribution: berthold 2009-11-04

Collectors Summary

Color lauchgrün
Streak color weiß
Lustre Matt, schimmernd bis Seidenglanz
Hardness (Mohs) 7
Cleavages keine
Fracture muschelig, spröde
Crystal System trigonal,

Chemism

Chemical formula

SiO2

Additional chem. information

Lauchgrüne Quarz-Varietät

Chemical composition

Silicium, Sauerstoff

Unit weight: 60.08439 u; Number of atoms in the formula: 3

Info

Empirical formula:

SiO2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

53.26

2

66.67

15.9994300

31.9988600

Silicon

Si

46.74

1

33.33

28.0855300

28.0855300

Classification by Hölzel

4.DA.380

4: OXIDES
D: Dioxides
A: Quartz-Group

Mineral status

Varietät

Variety / polytype of

Quartz

Optical Properties

Color

lauchgrün

Streak color

weiß

Lustre

Matt, schimmernd bis Seidenglanz

Crystallography

Crystal System

trigonal

Cell parameters b (Å)

-

Cell parameters c/b

-

Physical Properties

Hardness (Mohs)

7

Cleavages

keine

Fracture

muschelig, spröde

Preface

Associations

Aktinolith, Andradit, Hämatit, Hedenbergit

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

'Amethyst' (Var.v. Quartz)

SiO2

trigonal : 32 : P3121, P3221

4.DA.350

'Rose Quartz' (Var.v. Quartz)

SiO2

4.DA.360

'Prase' (Var.v. Quartz)

SiO2

4.DA.380

'Aventurine' (Var.v. Quartz)

4.DA.390

'Milky Quartz' (Var.v. Quartz)

4.DA.395

Other languages

English

Prase

German

Prasem

Russian

Празем

Alternative Name

Edinite

Prasio

Prasius

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Prasem
Google-Bilder-Suche - search for: Prasem
Mineralogisch-Petrographisches-Institut Hamburg - search for: Prasem

English pages

Mindat - search for: Prase
Webmineral - search for: Prase
Handbook-of-Mineralogy - search for: Prase
RRUFF Database-of-Raman-spectroscopy - search for: Prase
American-Mineralogist-Crystal-Structure-Database - search for: Prase
Athena - search for: Prase

Russian pages

Webmineral.ru - search for: Празем

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Prasem
Crystal-Treasure.com - search for: Prasem
Bosse - search for: Prasem

Navigation

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