Struvite
St Nikolai church, Hamburg-Mitte, Hamburg, Germany
0.9 x 0.9 x 0.6 cm (largest). Struvite is a rare hydrated organic phosphate. It is commonly found as a product of organic decay in putrescent matter, canned foods or other bacterial action on organic compounds, and as a constituent of human kidney and bladder stones in alkaline and infected urines. This set of 5 sharply crystallized, partially ...
© Rob Lavinsky & irocks.com