1 inch 25.4mm Cast Selenium Cube 99.99% Engraved Periodic Table Se Specimen

Description

This batch of cased Selenium cube, were regarded as defective products, have been held in warehouse for 6 months.
We have being tried to make Selenium cube with good shape, but as brittle material, Se is quite difficult to machine, the edges are very easily chipped, so we chose to make cubic Se using casting technology then.
Cased Se cube has some weakness, first, there is a “Sunken deformation” area on the top side, it was formed by cooling rate difference between inner area and surface; Second, there is a casting “scar” on the bottom side, when the high temperature liquid Se poured into the mold, such a scar is difficult to avoid at the touch point.
But casted cube has the glossy surface, such glossy black surface is attractive, machining process will destory the gloss . The machined Se cubes might have prefect cubic shape, but have not a glassy surface, that is an important reason why we decided to release these Se cubes.
Please note: different with machined products, casted Se cubes have not uniform shape.
On Oct-13-17 at 04:29:11 PDT, seller added the following information: