5 Essential Beginners Glass Engraving Tools and How to Use Them
Amazon.com: Diamond Engraving Bits Set For Dremel Rotary Tool Stone Engraver Bit Gemstone Shaping Etching Accessory Kit Coated Drill Rock Working Jewelry Etcher Gem Wood Metal Sea Shell Ceramic Porcelain Glass :
Other examples around the web...you use an etching cream. | Glass etching, Glass engraving, Dremel crafts
tool usage - How can I avoid chipped edges on glass etching with a Dremel? - Arts & Crafts Stack Exchange