Hebron glass (Arabic: زجاج الخليل, zajaj al-Khalili or azaz al-Khalili) refers to glass produced in Hebron as part of a flourishing art industry established in the city during Roman rule in Palestine. Hebron's Old City still contains a quarter named the "Glass-Blower Quarter" and Hebron glass continues to serve as a tourist attraction for the city. Traditionally, the glass was melted using local raw materials, including sand from neighbouring villages, sodium carbonate (from the Dead Sea), and coloring additives such as iron oxide and copper oxide. Nowadays, recycled glass is often used instead. Glass production in Hebron is a family trade, the secrets of which have been preserved and passed down by a few Palestinian families who operate the glass factories located just outside the city. The products made include glass jewellery, such as beads, bracelets, and rings, as well as stained glass windows, and glass lamps. However, due to the Palestinian-Israeli conflict, glass production has suffered a decline.