- Chemistry: Ca2Cu2Si3O10 - 2H2O;
Hydrated Calcium Copper Silicate
- Class: Silicates
- Subclass: Nesosilicates
- Uses: A very minor ore of copper and as an ornamental stone.
Kinoite is an attractive copper mineral.
Its general light blue color is significantly different from other dark blue copper minerals such as
In aggregate and encrusting specimens of kinoite the blue color is rather palish compared to
these minerals, but that does not imply that it is unattractive. On the contrary kinoite's color
is quite unique and a welcome addition to the mineral kingdom's color palette. The color could
be described as a somewhat purer blue than that of common
Kinoite is a fairly scarce mineral.
It is found in only a few localities around the world and most good specimens seem to come from
the Christmas Mine in Gila County, Arizona. It is often associated and coated with small
crystals of apophyllite
which can give a specimen a nice sparkle. Micromountable specimens of kinoite, which have a
deeper blue color, are also available and quite attractive and are similar in appearance to
clusters of cavansite.
- Color is a unique light blue for crusts and a deep blue in microcrystals.
- Luster is vitreous.
- Transparency specimens are transparent to translucent.
- Crystal System is monoclinic.
- Growth Habits include small acicular to thin prismatic crystals
found as spherules or sprays of acicular radial crystal clusters. Other
habits include massive and as crusts.
- Hardness is varies from 2 - 5 depending on whether in crusts or individual crystals.
- Specific Gravity is approximately 3.2 (above average for a non-metallic minerals)
- Streak is blue.
- Associated Minerals are apophyllite,
- Notable Occurrences are the Santa Rita Mountains in Pima County and the Christmas
Mine, Gila County, Arizona, USA and a few other secondary copper deposits.
- Best Field Indicators are color, crystal habit, locality and associations.