A great cabinet example of rhodochrosite from Japan, displaying the typical botryoidal habit. This piece has stronger color than most, with the standard color usually being a bit more pastel.
The color does vary a bit with lighting-- you get the best color under incandescent lighting.
The Oppu mine was intermittently worked for various ore between the 1600's and closure 1979, with a final smaller scale operation undertaken int he 1980's to recover lapidary rhodochrosite.