Chrysanthemum stone, sometimes called "flower stone," is a stone "flower" produced millions of years ago due to geological movement and natural formation in the rock. The stone's pattern resembles the chrysanthemum flower. The flower is milky white and grain is clear.
The chrysanthemum stone is approximately 270 million years old. It is a dark gray to black limestone matrix with andalusite crystals taking on the appearance of a chrysanthemum and contains more than 10 kinds of trace elements, such as selenium, stronium, gold, silver, & bismuth.
The black rock itself is a piece of limestone. Although limestones generally are lighter in color, this one is quite black because of the presence of substantial amounts of organic carbon. This rock is Permian in age, from a time when many areas that today make up China were offshore or underwater plateaus.
The white pattern on the rock is formed of crystals of celestine (or celestite), a strontium-sulfate mineral. Celestine commonly forms elongate crystals of the form seen here, although these are fairly rare in that they’re so thin and on the surface of another rock.
Read more at http://www.geologyin.com/2018/10/chrysanthemum-stone-natural-flower-stone.html#vvqTuKasM4mX8Tcb.99
This listing is for 1 of the stones photographed.
Average Weight: 62g
Average Size: 70 x 50 x 10mm