Authentic sea glass colors reflect all the spectrum of glass colors and tones from clear to black that have been produced over the centuries.
A brief look at the history of sea glass explains this. Glass was first made possibly as early as 1730 BC in Asia.
Glass is made from silica (historically in the form of sand) and alkali
or soda ash (sodium carbonate), which can be extracted from the ashes
of many plants. These two ingredients were melted together to form early
This process, which makes soda-lime glass, is still the basic process used in making glass today.
Clear (white), as we know, is made with soda-lime. Impurities in the sand used resulted in fairly-common pale green.
To produce colors the following minerals alone or combined with other minerals produce the following colors glass:
|Bluish-green (beer and wine bottles)||Iron|
|Amber, yellow, and near black||Sulphur|
|Amethyst and purple||Manganese|
|Red and pink||Selenium|
|Ruby and cranberry||Metallic gold|
|Dark red (opaque)||Pure metallic copper|
|Blue, violet, purple, and black||Nickel|
|Fourescent yellow, green, and red||Uranium|
|Orange-red to yellow||Silver|
As you can see, some of the most beautiful colors involve not only much more
costly ingredients, but the process involved also may cost significantly
more to produce deep vibrant colors and so has generally only been used
for limited production.
Naturally, the rare exotic hues are the most vibrant sea glass colors and also the most sought after by collectors for their sea glass collections and sea glass jewelry and sea glass art.