red rock with crystals - Stock Image

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The specimen is comprised of four layers from a copper-zinc-lead-tin vein, from the top or outer layer of yellow-brown iron stained quartz (citrine) with disseminated zinc blende (sphalerite)/cassiterite (tin)/ and copper (possibly bornite or peacock ore) which also forms a distinct basal layer to the quartz (layer2). The next layer looks like the wall of the vein with fine metallic copper sulphide, iron pyrites perhaps in a micro-granitic or felsitic ground mass. The lowest area of the photo shows the clean country rock that the vein or lode has been intruded into, probably microgranite. Much of the speciment shows fine felspathic veining intruded from the granite host as the last stage of injection of the vein.
Stock Photo: 3089956
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Uploaded on: 03-23-07 © lindarocks
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