Heulandite

Item Description

This is a fairly hard to find Heulandite specimen (the specific species is unknown) from this classic Italian Alpine region featuring sharp, well-formed, deep orange-red colored crystals measuring up to 7 mm, sitting on matrix. Heulandite is not commonly seen in good display specimens from the Alps, and this is an interesting specimen for any diehard fan of European Alpine minerals. These specimens can date back as far as the early 1900s, though I can't say for certain when this one was mined.
From the worldwide mineral collection of Albert Lewis Kidwell (January 1, 1919 - August 16, 2008). Al was a well-known mineral collector and research geologist with Carter Oil Company and later Exxon Oil Company in Houston, Texas. The phosphate species Kidwellite was named in his honor in 1974.