PATIKIL Niobium Cube, 10mm Nb-Density Cube High Density Element Cube Unique Metal Cube Periodic Table of Elements Collections Lab Experiment Teacher Scientific Classes

Just interesting -- same density as gold (19.2 vs 19.3 g/cm). Weighs about right on my kitchen scale, so I suppose it's the real thing. A 1cc sample does not feel ponderously heavy -- perhaps a 1 cubic inch sample would yield a greater impression (I suppose it would have to, speaking physically). Very sharp corners and edges, labelled on two sides, and comes with a good size plastic box (maybe the box has a purpose: don't put those sharp edges on something they may scratch, and don't drop it on a hardwood floor, or a toe -- very sharp).

Absurdly heavy! Highly recommend!

It came on looking shiny with no blemish.