I am pleased with how this image came out, using CANON MP-E 65mm, at 3x, on an old 50D body. Stacked with ZS Pmax with minor DMap retouching, followed by some minor sharpening and dodge/burn in PS.
This specimen was collected by the mine geologist many years ago, from the Union Carbide Mine, Wilson Springs, Garland Co., Arkansas, USA - consists of orange spiky balls of cacoxenite with brown siderite crystals.
Cacoxenite with Siderite
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Cacoxenite with Siderite
It's not what you look at that matters, it's what you see - Henry David Thoreau