When I was in station repair they sent out to visit an old boomer lineman" just sit for ahile and let him tell you about the old days". Well he showed me all the pictures of the boomers all standing on x-arms and so on, well in the corner of the living room was what looked like a glass xmas tre, turned out it was a groud rod hit by ighting in sandy soil; the sand had crsytalized into glass looked just like a clear glass x-mas tree.