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The name alludes to the composition, containing CALCIum and BORon.
Calcium Metaborate

Classification of Calciborite

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

B : Diborates
C : Ino-diborates with triangles and/or tetrahedra

5 : Miscellaneous

9 : Borates
3 : Borates of Ca and Sr

Optical Data of Calciborite

Biaxial (-)
RI values:
nα = 1.595 nβ = 1.654 nγ = 1.670
Measured: 54° , Calculated: 52°
Max Birefringence:
δ = 0.075
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r > v or r < v

Chemical Properties of Calciborite

IMA Formula:
Elements listed in formula:

Crystallography of Calciborite

Crystal System:
Cell Parameters:
a = 8.38 Å, b = 13.82 Å, c = 5 Å
a:b:c = 0.606 : 1 : 0.362
Unit Cell Volume:
V 579.06 ų (Calculated from Unit Cell)

Type Occurrence of Calciborite

Relationship of Calciborite to other Species

9.3.6OlshanskyiteCa2[B3O3(OH)6]OH · 3H2O
9.3.8KorzhinskiteCaB2O4 · 0.5H2O
9.3.9TyretskiteCa2B5O9(OH) · H2O
9.3.10NifontoviteCa3[BO(OH)2]6 · 2H2O
9.3.12InyoiteCaB3O3(OH)5 · 4H2O
9.3.13GoweriteCa[B5O8(OH)][B(OH)3] · 3H2O
9.3.14ColemaniteCaB3O4(OH)3 · H2O
9.3.15PentahydroboriteCaB2O(OH)6 · 2H2O
9.3.16HexahydroboriteCa[B(OH)4]2 · 2H2O
9.3.17MeyerhofferiteCaB3O3(OH)5 · H2O
9.3.18PriceiteCa2B5O7(OH)5 · H2O
9.3.19GinoriteCa2B14O20(OH)6 · 5H2O
9.3.20ProbertiteNaCaB5O7(OH)4 · 3H2O
9.3.21UlexiteNaCaB5O6(OH)6 · 5H2O
9.3.22HydroboraciteCaMg[B3O4(OH)3]2 · 3H2O
9.3.23InderboriteCaMg[B3O3(OH)5]2 · 6H2O
9.3.24WardsmithiteCa5Mg(B4O7)6 · 30H2O
9.3.27VeatchiteSr2[B5O8(OH)]2B(OH)3 · H2O
9.3.28Veatchite-ASr2B11O16(OH)5 · H2O
9.3.29 P-VeatchiteSr2B11O16(OH)5 · H2O
9.3.30 BalavinskiteSr2B6O11 · 4H2O
9.3.31TunelliteSrB6O9(OH)2 · 3H2O
9.3.32StrontioginoriteSrCaB14O20(OH)6 · 5H2O

Other Names for Calciborite

Name in Other Languages:

Other Information

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 Calciborite

Reference List:
American Mineralogist (1956): 41: 815.

American Mineralogist (1964): 49: 820.

Soviet Physics – Doklady: 15: 1003-1005.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Kobayashi, S., Ando, T., Kanayama, A., Tanabe, M., Kishi, S., Kusachi, I. (2014): Calciborite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 109, 13-17.

Internet Links for Calciborite URL:
Please feel free to link to this page.

Localities for Calciborite

This 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.
  • Honshu Island
    • Chugoku Region
      • Okayama Prefecture
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Fuka
Kobayashi, S., Ando, T., Kanayama, A., Tanabe, M., Kishi, S., Kusachi, I. (2014): Calciborite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 109, 13-17.
Russia (TL)
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Krasnotur'insk (Bogolovsk; Krasnoturjinsk; Krasnoturyinsk)
          • Turya river
            • Tur'insk
[AmMin 85:1322]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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