Thread: Natural Stones

There is one well-known one that achieves its qualities by being at the junction of an igneous flow. It's nature and appearance vary accoding to how far away from the heat source - any idea?

Regards,
Neil

Arkansas Hone

Originally Posted by Neil Miller

There is one well-known one that achieves its qualities by being at the junction of an igneous flow. It's nature and appearance vary accoding to how far away from the heat source - any idea?

Regards,
Neil

Originally Posted by WW243

Arkansas Hone

Nope - it looks like it might be but it is really a microcrystalline form of a sedimentary rock formed from volcanic, etc, ashes.

Diamond or Garnet?

Originally Posted by Neil Miller

There is one well-known one that achieves its qualities by being at the junction of an igneous flow. It's nature and appearance vary accoding to how far away from the heat source - any idea?

Regards,
Neil

Diamond is really a metamorphic rock. It is the same stuff as soft graphite and carbon, but heat and pressure have transformed it into what is termed an allotrope of carbon - same stuff, different characteristics. Garnets are a form of metamorphic rock, but often found within igneous deposits...

Mr. Miller has a reputation of knowing his hones very well, we can now see that he also know geology. I am impressed.

Cat Eye, Steeley, Clayey.....

Originally Posted by Neil Miller

There is one well-known one that achieves its qualities by being at the junction of an igneous flow. It's nature and appearance vary accoding to how far away from the heat source - any idea?

Regards,
Neil

Cat Eye is a reflective glass sphere found in roads. It is not a natural...
Steeleye (Span) is an old english folk/rock group from the late 1960s..,
Clayeye is one of a pair found in dolls and assorted puppets...

Not sure Neil, pumice or granite?

Ratho Hone