Glass coloured red by the inclusion of specific impurities such as gold or metal oxides.
More example sentences
- The art of incorporating this liquid gold into ruby glass is attributed to German glassmaker Johann Kunckel in the late seventeenth century.
- Even before that, the island was shrouded in legend after alchemist Johannes Kunkel tried to make gold there in the 17th century, producing ruby glass instead.
- Others were ambrotypes, a related antique method in which the original plate is backed with ruby glass or some other dark material that reverses the negative image.
Definition of ruby glass in:
- The US English dictionary