Thullium metal (99.9%)
Magnification = 20x
Color = accurate
Date = 12-29-06
This 3/16” wide x 3/4” long x 1/32” thick rare earth metal subjected to low and intense heat from propane torch would glow brilliant red, but would not begin to melt and upon cooling it darkened from a semi-shinny white.
No sublimate would form.