Greetings Fossil Forum
We are here because frankly we really do not know where else to start!
Some 50 years ago, while on a semi tropical island...
-a somewhat recent (surprisingly thin) lava flow that went across some very shallow water, ran over a large shell.
-The lava vaporized the upper part creating an bubble that later broke open to reveal what you see in the photo:
-the lower part being preserved somehow with parts of the original shell converted to Basalt,
-the rest virgin with sand and small local shells still attached., no Lie!
-We are lifelong collectors and have never even heard of something like this.
-Here is a photo to get started; we have much more info.
We will start a FaceBook and Youtube bit if needed.
But would rather goto the collectors on your site to start as we need some advise and wisdom about such a find.
Please contact through this forum
Thank You
tgtbt