M4x

'Platy ' nature of this crystalline gold nugget (called specimenA here for convenience) can be seen with the naked eye.

Most of this nugget has been encrusted with celestine/barite crystals.

M 40x

A part of specimenA showing typical blocky and stepped crystalline structure for this type of salt lake nugget.

Magnification of part of specimenB showing clear evidence of a later secondary purer gold deposit, spongy in nature, over crystalline gold.
Possibly a bactrerial secondary deposit.

Crystalline gold appears silvery due to reflection.

M40x

A sharp crystalline part of specimenB  40x just showing filamentous texture on one flat surface. Higher magnification with this microscope was not possible.

A typical small salt lake nugget with its usual   celestine/barite coating sometimes I have called this 'calcrete' which is technically wrong as it is not a carbonate but a sulphate. The crystalline gold structure is hard to see with the naked eye but by the sparkly, reflectiveness of the gold it is obvious that the gold is crystalline and under a microscope would show the same sharp blocky layered structure.

The 'blocky' nature of this seed type nugget is obvious to the naked eye. This nugget was found as shown in shallower lake sediments and has probably been partially 'weathered'.

A little rounded 'seed' nugget which is nearly completely enclosed in the celestine/ barite deposit which seems to protect the crystalline surface. Blocky nature of gold can be seen.