Tuesday, October 16, 2018
A small green "stone" I picked up on a beach turned out to be a piece of glass.
The frosted appearance and the presence of C-shaped marks suggest this is genuine sea glass. The marks are best seen when held up to the light.
Similar items can be produced artificially, but not the frosted look or the marks - which are apparently a result of a chemical reaction between the pH of the ocean and the ingredients of glass.
Sea glass comes from bottles and jars thrown whole or smashed into the sea long ago, and worn smooth by being tumbled in waves and sand; people collect it, and some make it into jewellery. Not bad for pieces of rubbish.
// posted by Christine @ 8:16 AM 
