The Pink Panther in "Pink At First Sight", 23 Minute Valentine's Day Special
The term aqua is a preferred by this website shorthand version of the term aquamarine. Aqua glass is a "natural" result of the iron impurities found in most sands. It is very rare maybe unknown that sand does not contain some traces of iron. Sand deposits with very low iron content were and probably still are highly valued commodities.
Although good quality sand was plentiful in the Eastern United States, some was still being imported from Belgium for Western American glass factories as late as the s. Aqua glass is the result of sand which is relatively low in the amount of iron which was not off-set by de-colorizing agents as noted in the colorless dating site san to follow that has pink discussion above. Natural aqua glass was often called "green glass," "bottle glass," or "bottle glass green" by glass makers Kendrick ; White Different shades of aqua and the related blue-green colors which are often observed in the same bottles blown in the same mold may be explained - at least in part - by the following information quoted from Julian Toulouse's excellent book A Collector's Manual - Fruit Jars a.
This excerpt is making reference to some of the effects - desired or not - that occur when mixing and melting glass.