40x
Molybdenum 99+%
Color = accurate
Because I could not produce the slightest sublimate from this hard metal, and that Moly is sometimes a mineral constituent of Lead sulfide these shavings were, with difficulty alloyed with 99.5% pure Lead.
The below images on both white and blackened plaster of Paris tablets illustrate limited hot sublimates of this alloy.

10x
Colors are close to accurate.
The PbMo alloyed button on the blackened plaster tablet..
Due to the intense heat applied by the propane torch the black soot that blackens the tablet was burned off near the PbMo alloy.
Direction of flame is from left to right.

20x
The bluish-green dots are tiny beads of what looks like iridescent Lead metal spheres.
The brown stains appear to be the primary indicator sublimate that Moly is present.
Plaster cracks are the result of prolonged intense heat.

40x
Same image as above.
The reddish-orange semi-translucent feathers on top of PbMo button is red lead oxide (Pb3O4), which easily forms when lead is heated/melted and a strong draft is present to create the oxidation of Lead. The entire biutton is coated with a transparent glaze of lead oxide (glassy glaze).
No distinguishable button characteristics that allow indications of Moly being part of the lead.
Further chemical digestions/tests (micro-chem assays) would be able to prove or deny the presence of both metals.