Another Mineral ID question

[jethro]

I've been collecting a bit of rock left behind by the old timers in the ore paddocks of their shafts. this stuff has probably come from upper level of the ore body & been laying around on the surface for nearly 80 years. I haven't been able to take some good pictures until now. I am hoping that the Geos on here can tell me what the yellow / green encrustation is in the weathered/oxidized areas of this ore.

There is a speck of gold showing on the above speccie but I dont think it will show up on the resized image.
The next specimen is from the same area but a different line of workings.

I've got a fair idea of what the mineral encrustations may be but was just looking or confirmation or otherwise from those more knowledgable.

 

[lucky streak]

To me it looks like bedrock or oxide quartz vein.

 

[SWright]

G'day Jethro

Yep it is quartz and iron oxides and sulphates (probably) after iron sulphide - pyrite. Looks as if some may be also after arsenopyrite. that would have been the vein they were mining. Give it a crush in a dolly pot and pan it off.

Araluen

 

[jethro]

Yes araluen the larger specie on the left in the second pic is at least 50 % pyrite & Arsenopyrite. The one on the right has a lot of Arsenopyrite showing on the back side. I am wondering what arsenopyrite weathers to.
I have about 2 buckets full of the ore from the first pic. I have crushed a bit but have decided to wait until I have my impact mill up and running.