The Sea Glass Shard of the Month: March 2015
A Kelly Green Sea Glass Soda Bottle Bottom
A sea glass gem that is possibly a segment of a soda bottle bottom.
Sea Glass Specifications:
Color: Kelly Green
Length: 52.5 mm (2.068")
Width: 24.7 mm (0.972") at highest
Thickness: 6.7 mm (0.265") average
Weight: 16.5 grams (0.58 ounces)
This green lime-wedged sea glass shard probably came from the bottom of a soda bottle like the ones used to bottle 7-Up™ and Sprite™.
It is possible that this sea glass has been in the ocean since the early 1960s when these types of soda bottles started to become commonplace, tossed into the ocean or left behind at a picnic outing on a beach in Puerto Rico.
Kelly green is a common color for sea glass, in part due to the multitude of soda bottles produced using this color.
While most simple soda-lime glass will have a light green or blue tine tint due to the impurities (usually iron and/or copper) found in sand, a darker shade of green can be achieved by adding iron oxide as the coloring agent to the recipe. Black glass, which most often was an extremely dark green, was obtained by adding iron slag.
"There are probably more different shades of green to be found in bottles than any other color.[1]"
There are probably more different shades of green to be found in bottles than any other color.[1] Other shades of green sea glass, from yellow-green to forest green, were formed by a myriad of different coloring agents, impurities, and glass making processes.
REFERENCES:
1. www.sha.org/bottle/colors.htm
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