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Gustav Rose
Ca2(Co2+,Mg)(AsO4)2 · 2H2O
Rose-red, pink; rose ...
Member of:
Named in 1824 by Armand Levy in honor of German mineralogist Gustav Rose [March 18, 1798 Berlin, Germany – July 15, 1873 Berlin, Germany], Professor of Mineralogy, University of Berlin.
Dimorph of:
Isostructural with:
Roselite Group. Roselite-Wendwilsonite Series.
The monoclinc dimorph of β-Roselite. The cobalt analogue of Wendwilsonite.

Classification of Roselite

Approved, 'Grandfathered' (first described prior to 1959)

C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1

2 : AB2(XO4)2·xH2O

20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni URL:
Please feel free to link to this page.

Type Occurrence of Roselite

Geological Setting of Type Material:
Quartzose vein material
Associated Minerals at Type Locality:

Physical Properties of Roselite

Vitreous, Sub-Vitreous, Resinous
Diaphaneity (Transparency):
Transparent, Translucent
Rose-red, pink; rose coloured in transmitted light.
Darker coloured crystals frequently exhibit marked colour zoning due to variations in composition.
White to pale pink
Hardness (Mohs):
On {010}, perfect (easy).
3.46 - 3.74 g/cm3 (Measured)    3.65 g/cm3 (Calculated)
Density increases with Co content

Crystallography of Roselite

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Space Group Setting:
Cell Parameters:
a = 5.801Å, b = 12.898Å, c = 5.617Å
β = 107.42°
a:b:c = 0.45 : 1 : 0.435
Unit Cell Volume:
V 401.00 ų (Calculated from Unit Cell)
Crystals short prismatic [001]; thick tabular {001} uncommon. Terminations commonly simple and exhibiting monoclinic or orthorhombic aspect with large {122} and {122}. Druses of interlocking crystals and spherical aggregates.
On {100}, very common, with {100} as the composition plane; also as fourlings.
X-Ray Powder Diffraction Data:
6.444 (20)
5.089 (20)
3.395 (35)
3.354 (60)
3.222 (75)
2.993 (100)
2.763 (50)

Optical Data of Roselite

Biaxial (-)
RI values:
nα = 1.694 - 1.725 nβ = 1.704 - 1.730 nγ = 1.719 - 1.735
Measured: 60° to 70°, Calculated: 68°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r > v weak
Optical Extinction:
X = b, X^c = ~0° - 4°, Y = b, Y^c = 12°-20°, Z^c = -70°to 91°
Light rose coloured material:
X = ^c~ 0° to 4° = Light rose pink to dark rose-pink, Y = paler rose pink than in X, Z = palest rose pink
Y = b = Lighter rose
Z = ^c~ 90° to +91° = lightest rose

Dark rose coloured material:
X = b = Dark rose
Y = ^c

Chemical Properties of Roselite

Ca2(Co2+,Mg)(AsO4)2 · 2H2O
All elements listed in formula:

Relationship of Roselite to other Species

Forms a series with Wendwilsonite (see here)
Member of:
Other Members of Group:
BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2O
KröhnkiteNa2Cu(SO4)2 · 2H2O
RruffiteCa2Cu(AsO4)2 · 2H2O
Unnamed (Fe2+-analogue of Brandtite)Ca2Fe2+(AsO4)2 · 2H2O
WendwilsoniteCa2Mg(AsO4)2 · 2H2O
ZincroseliteCa2Zn(AsO4)2 · 2H2O
8.CG.05CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2O
8.CG.05CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
8.CG.05FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2O
8.CG.05MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
8.CG.05β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2O
8.CG.05HilliteCa2(Zn,Mg)(PO4)2 · 2 H2O
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2O
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2O
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2O
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
8.CG.15MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2O
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2O
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4·H2O (0.8 < x < 1.0)
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2O
20.10.1ErythriteCo3(AsO4)2 · 8H2O
20.10.4β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
20.10.5WendwilsoniteCa2Mg(AsO4)2 · 2H2O
20.10.6Cobaltkoritnigite(Co,Zn)(HAsO4) · H2O
20.10.9AnnabergiteNi3(AsO4)2 · 8H2O
20.10.10SmolyaninoviteCo3Fe23+(AsO4)4 · 11H2O

Other Names for Roselite

Name in Other Languages:

Other Information

Not fluorescent in UV
Other Information:
Readily soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Roselite

Reference List:
Lévy (1824) Annals of Philosophy, London: 8: 439.

Lévy (1825) Edinburgh Journal of Science: 2: 177.

Schrauf (1874) Mineralogische und petrographische Mitteilungen, Vienna: 137.

Winkler (1874) Zeitschrift praktische Chemie: 10: 190.

Weisbach (1877) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: 407.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 810.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 128.

Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 7: 127.

Peacock (1936) American Mineralogist: 21: 589.

Wolfe (1940) American Mineralogist: 25: 750.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 723-725.

Canadian Mineralogist (1977): 36-42.

Dunn, P. J., Sturman, B. D., Nelen, J. A. (1987): Wendwilsonite, the magnesium analogue of roselite, from Morocco, New Jersey, and Mexico, and new data on roselite. Am. Mineral., 72, 217-221.

Weiss, S., Lengauer, C.L., Parodi, G.C. (2002): Roselith, Wendwilsonit und kobalthaltiger Talmessit aus Bou Azzer, Marokko. Lapis 27 (1), 37-41; 58. (in German)

Internet Links for Roselite

The following Roselite specimens are currently listed for sale on

Localities for Roselite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Queensland
    • Cloncurry Shire
      • Kajabbi
S. Mills XRD data
  • South Australia
    • Olary Province
      • Kalabity homestead area
Jack Leach collection & Museum of Victoria
  • Daşkəsən District (Daskasan; Dashkyasan)
    • Dashkesan
Pekov, I. V., Vinogradova, R. A., Chukanov, N. V., & Kulikova, I. M. (2001). On magnesian and cobalt arsenates of the fairfieldite and roselite groups. Zapiski Vseross. Mineral. Obshch.(Proc. Russ. Miner. Soc.), 130(4), 10-23.
  • British Columbia
    • Slocan Mining Division
      • Sandon
Mauthner, M.H.F. et al. (1996) Minerals of the Silvana Mine Sandon British Columbia. Mineralogical Record, 27(6):433-438.
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
maurizio dini collection - quantitative analysis
  • Baden-Württemberg
    • Black Forest
      • Schapbach
        • Wildschapbach valley
Wittern: "Mineralfundorte in Deutschland", 2001
      • Schenkenzell
        • Wittichen
          • Heubach Valley
No reference listed
  • Hesse
    • Odenwald
      • Abtsteinach
        • Mackenheim
M Kampf collection
    • Richelsdorf District
      • Bauhaus
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • Rhineland-Palatinate
    • Siegerland
      • Betzdorf
        • Schutzbach
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Saxony
    • Erzgebirge
      • Schneeberg District
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 753.
Lapis 30(7/8):41-70 (2005)
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 725.
Lapis 30(7/8):22-23 (2005)
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 725; Wittern: "Mineralfundorte in Deutschland", 2001
Lapis 30(7/8):22-23 (2005)
  • Esfahan Province (Isfahan Province; Aspadana Province)
    • Nain County (Nayin County)
      • Anarak District
Bariand, P., Bachet, B., Brassy, C., Medenbach, O., Deliens, M., Vautier, R., & Piret, P. (1993) A New Uranium Mineral from the Talmessi Mine, Iran, and Rabejac, France. Mineralogical Record: 24: 463-467
  • Piedmont
    • Torino Province
      • Lanzo Valleys
        • Viù Valley
          • Usseglio
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Aghbar
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
JP Barral collection
          • Aït Ahmane
Georges FAVREAU collection
          • Bou Azer
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Oumlil
M. Kampf collection
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