As sea glass becomes harder to find, some retailers are creating their own artificial sea glass using rock tumblers and chemicals. The difference between the real and artificial beach glass is ...

Now, as sea glass becomes rarer, artificial versions, sometimes made via acid etching, are supplanting the real thing. But acid etching can leave a toxic residue, making this manufactured gem ...

the soda and lime are slowly filtered out of the glass, leaving microscopic pitting, mostly in the shape of a small crescent, or ‘c,’ which is impossible to duplicate with artificial sea glass ...