Jewelry By Renee features a variety of colors of beautiful borosilicate glass jewelry. We have yellow, blue, gold and red jewelry. Borosilicate glass is a type of glass which includes at least five percent boric oxide. The boric oxide makes the glass stronger and more durable than conventional glass. The invention of borosilicate glass is generally credited to otto Schott, a German glassmaker who worked in the 19th century.
