Grading Sea Glass

The idea of grading sea glass is based primarily on what you plan to do with the sea glass. The grading system is mostly used by avid collectors, sellers, or extreme hobbyist.

It is important to note that the grading scale does not definitively relate to the use. Jewelery grade can be used for crafting, and crafting grade can be used for jewellery. 

 Jewellery grade 

It takes years of tumbling for a piece of glass to become rounded and frosted enough to be considered jewellery garde.

Grade A Characteristics

This grade has nicely rounded corners, and is thoroughly and evenly frosted, with no defects.

Grade B Characteristics

May have a single small chip or defect.
Edges may also be more defined


Sea glass in a unique form, or patterned. It may have a few defects, but due to its originality or rarity, it can be used in jewellery.

Crafting grade 
Grade A Characteristics

Has visible defects such as chips. Edges may
be irregular and/or rough. Patterns may be apparent.

Grade B Characteristics

May be only partially frosted with several defects or rough/sharp edges. Used most commonly for mosaics

New Glass

No frosting, sharp edges, and often lots of defects. New glass is often tossed back into the waves by collectors. This way the glass can continue its transformation.

Modified Glass

This is glass that originally came from the sea, but it was then tumbled by humans, coated with a chemical of some short, or even broken to create new shapes.

Synthetic Glass

This is glass that was never in the sea at all, but was created to look like sea glass.

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