Cobalt Sea Glass

Uncommon Sea Glass Color In Puerto Rico


Rare cobalt blue sea glass bottle bottome collected in Puerto Rico

This is one of the most beautiful sea glass colors, yet comes from unglamorous items such as Phillips Milk Of Magnesia, Vicks Vaporub, Bromo Seltzer and Noxzema. In Puerto Rico there were also Latin American versions of these products like Laxol from Rio De Janeiro. Cobalt sea glass dates back through the Victorian ages and beyond. The odd piece comes from Victorian era window panes.

Many medicines came bottled in cobalt glass. My great aunt died in Vieques, Puerto Rico at the age of twelve from tuberculosis. She is buried in a cemetery close to one of Vieques best seaglass beaches. It awes me to think that some of the cobalt shards that still dance around in the sea right there may have come from a bottle of medicine that provided hope or comfort to her.

There are different shades of cobalt sea glass some are darker than others. Pieces that are very dark - so dark that they have to be held up to the light to tell the color are extremely rare, maybe more rare than orange.

In many places cobalt sea glass is considered to be a rare color. In Puerto Rico it has become uncommon. When I started collecting sea glass there in 1987 it was common and I have always been able to match up two to three hundred pairs of earrings a year. However, it is a valuable color and will continue to increase in value.


These images are of a sea glass bottle bottom and I think sea glass swizel sticks!

Cobalt blue sea glass or beach glass collected in Puerto Rico Rare cobalt blue sea glass or beach glass collected in Puerto Rico

These are sea glass bottle mouths

Cobalt blue sea glass or beach glass collected in Puerto Rico Cobalt blue sea glass or beach glass collected in Puerto Rico






Out Of the Blue Seaglass Jewelry is a member of the North American Sea Glass Association