Roweite occurs as reddish to dark brown granular crystals up to 0.8 mm across in crystalline limestone near gehlenite-spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. It is closely associated with uralborite. 6.011 based on O = 13. The unit cell parameters are a = 9.057(2), b = 13.335(3), c = 8.284(3) Å. The calculated density is 2.92 g cm −3 . The roweite from the Fuka mine was probably formed as a secondary mineral from calcium borates such as uralborite in a reaction with manganese-bearing late hydrothermal solution.

Priceite was found as a mass or a veinlet in crystalline limestone associated with gehlenite-spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. Priceite occurs as grayish white or pale green aggregates of anhedral or prismatic crystals up to 0.5 mm in length in association with shimazakiite, sibirskite, uralborite and calcite. An electron microprobe analysis of priceite gave an empirical formula (Ca O based on O = 13. The unit cell parameters are a = 11.633(7), b = 6.977(3), c = 12.342(5) Å, β = 110.648(7)°. The calculated density is 2.486 g cm −3 . It is likely that priceite from the Fuka mine was formed as a secondary mineral by a late-hydrothermal alteration of shimazakiite at temperature between 100 and 190°C or less.

Calciborite was found as a veinlet or a mass in crystalline limestone associated with gehlenite -spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. Calciborite occurs as milky white aggregates up to 1 mm in diameter with shimazakiite, fluorite, bornite and calcite. An electron microprobe analysis of calciborite gave an empirical formula (Ca 0.999 , respectively. The calciborite from the Fuka mine was probably formed by a reaction of boron -bearing fluids with limestone at a temperature between 250 and 300 °C.