It is a very pretty conglomerate red matrix with specks and veins of shiny Native Copper and Felsite pebbles.
It is also known as Kingston Conglomerate.
This lovely brick orangey red colored stone, with shiny Native Copper, came from the Calumet & Hecla Mine in Houghton County, Michigan. Formed in 1871, the Calumet & Hecla Mine is an underground copper mine consisting of 96 levels with 16 incline shafts and one vertical shaft named Red Jacket. Mining operations ceased in 1968 following a labor strike.
This unique cabochon material was first discovered in 1962 by Diamond Drill Hole Ahmeek #35. The ore body stretches for about 60 miles and the vein is 1 to 100+ feet thick.
The camera dulls the shiny copper reflection in these cabochons-but it is very visible to the naked eye! The little black spots are the Felsite pebbles. Felsite is a very fine grained volcanic rock containing feldspar and quartz.
It is believed Native Copper helps with communication.