Seaglass with glaze or coating?

by Linda
(Boston )

Bluish glaze sea glass from Massachussetts beach

Bluish glaze sea glass from Massachussetts beach

~ sea glass question submitted by Linda, Boston, Massachusetts 

ID on Sea Glass found at 


Found this piece on a beach in Nahant,MA.

The blue color was the first thing I noticed when hunting.

Took home and after a soak and scrub the coating remained.

Have no idea what it could be, never seen glass like this on local beaches.

Any ideas? Thanks!

~ sea glass question submitted by Linda, Boston, Massachusetts 

Scroll down to see comments....

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Comments for Seaglass with glaze or coating?

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Oct 05, 2016
Bonfire glass
by: Lane

This seams to be a peice of bonfire glass also meaning at one point it seams that it has been burned.

Oct 05, 2016
by: Anonymous

It looks like this glass was burned at one point maybe look up bonfire sea glass?

Sep 25, 2016
Colonial Period Glass?
by: Siobhan O'Donnell

The first thing I noticed about your shard was the deep green (and some blue) color to it.

The second thing I noticed was the quality and grain of the glass itself. Judging by the color, and the fact that it is not one color, but a combination of two that was probably not on purpose, and the quality and wear of the Glass, I believe that you may have found a piece of colonial glass.

The area you found it also solidifies my stand. Massachusetts was one of the first colonies to begin attempting to make glass. The only problem was that they could not make glass the same way they had in Europe. They had to test local ingredients, such as sand, to find the right recipe to make acceptable glass. So they had to experiment around with the types of sands and other such things, leading to the dark green, impure glass often found along the east coast.

You can do some more research to find out more about it.

Aug 17, 2016
Thank you
by: Linda

Thanks for the help and info!

Aug 17, 2016
Mineral deposits
by: David & Lin @ OdysseySeaGlass

We have found some pieces of beach glass that look very similar.

Those pieces were very old and were on a sandy beach on the Chesapeake Bay at the mouth of a trickle of a stream.

The lack of much wave action, we feel, left them in that area of the beach and the glass became coated with mineral deposits from the spring feeding the little stream.

Sunlight then reacted with the minerals to produce almost a rainbow sheen on the dark glass.

That is our guess, anyway. :)

Aug 16, 2016
by: Anonymous

Looks to be a large piece of industrial slag.

Aug 14, 2016
I have a similar piece.
by: Selkie's Sea Glass

I have a smaller piece that is a dark green like this, with a patch of blue on the corner.

My feeling is that it could be carnival glass, or simply a piece of art glass.

Happy sea glassing!

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