Botryoidal Hematite Mineral Crystal Radio Detector Diode Cast in Brass Cup

Description

If you enjoy evaluating alternative Minerals for Crystal Radio Detectors
Semiconductor Botryoidal Hematite Crystal Radio Diode Cast in Brass Cup
Experimental Semiconductor Crystal Radio Diode Cast in Brass Cup
Size, Color and shape may vary from pictures
Newly Identified Experimental Mineral that outperformed the tuning stability of every mineral that I have tested to date, it is NOT Galena or Pyrite.
The Crystal is very hard and with a Gloss or Satin Surface appearance
I was able to find a Hot Spot in as little as 15 seconds
Customer Comment...
"
The
Botryoidal Hematite
is one hot crystal"
Mineral
has
electrical characteristics possibly making it suitable for use as
a
Crystal Radio
detector
1 piece
Crystal
Mineral
Crystal mounted and Cast in a 13mm" Diameter brass cup
Casting alloy is made from Lead, Tin and Bismuth-Cadmium Free