Tinticite is an extremely rare iron phosphate, found in only a few spots. Although microcrystalline here, the covering on the matirx is very rich and there is probably more inside - I should probably break it into 50 specimens to sell for thumbnail reference samples to the rarities colelctors, in fact. However, we'll leave it together first (though I think more money can be made by trimming and selling/trading off bits).