stinky rock

[alan p]

Found this rock on beach Norfolk England, it was out of place amongst all the other rocks, approx density of 2.96 and weight is 93grm, it has 6 pin size holes of 1mm deep, filed a couple of windows, slight mix colouration of greenish brown very similar to outside,few micro size clear glassy grains also tiny black grains, but it really stinks when cut like a freshly spent firework,any ideas folks

 

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[Hitndahed]

Yellow rock,,, smells like "fireworks".
I would venture a guess at it being some SULPHUR based material.

 

[alan p]

Yes I agree sulphur in material but what is the rock, sun brought out the Yellow otherwise very brown and density is high for sulphur, rock is very hard and marks up with hematite lines when cutting through outside of rock, lots of tiny yellow green and clear crystals poking out of rock and lots of crystals on inside and only smells for a few seconds when cut, any ideas what it may be

 

[Eu_citzen]

Pyrite, Sphalerite can have this sulphur like smell. In nature, sulphides often are somewhat mixed.