Asparagus stone is a clear asparagus-green gem variety of apatite; moroxite, a clear blue.
The fine intergrowth of apatite with wollastonite needles makes physical recovery of apatite single crystals difficult.
The mechanism of apatite formation is suggested.
The apatite fission- track dates are Proterozoic regardless of apatite eU.
The formation of apatite layer and the penetration of apatites into the pores were observed by scanning electron microscopy (SEM).
The silica incorporation favors the formation of apatite.
Two starting apatite samples were used in order to test for the effect of apatite chemistry on partitioning behavior.
In 1925 1926, significant deposits of apatite were discovered in the Khibiny Mountains, and the first apatite batch was shipped only a few years later, in 1929.
The resulting reduction of both free PO43− and free calcium lowers the relative apatite saturation, preventing formation of apatite crystals.
This flexible, enzymatic control of mineralization explains why the vertebrate skeleton is composed of apatite.
