Here's a Purple CD 1050 spool from Colombia with a huge chunk of pyramid shaped firebrick right where you want it! Rock measures 7/8" wide by about 3/8 inch tall! Displays awesome with underlighting! I've only seen 1 or 2 other spools with rocks this big in Zicme spools.

Small flakes and two tiny nibbles along the heavy factory overpoured outer rim (created at the factory when removing it from the mold), 2 small base pinhole flakes and 1 small upper pinhole flake. Some light use marks. These spools were made in limited quantities from bottom of the barrel factory glass batches from leftover glass mixture after making their CD 106, 154, 203 insulators.

First email gets this rarely seen pyramid junk in glass spool. $175 plus shipping. Price is firm. Thanks!