Create nature’s most perfect form—the sphere—in glass! After a basic introduction to melting and shaping borosilicate glass, you will complete several marble designs, including the clear gravity marble, the outside twist, the ribbon, or the eyeball. Techniques include hold and cold seals, color pulling, and color application.
New Health and Safety Guidelines
All students must review and adhere to all of The Crucible's Health and Safety Guidelines to best protect our students and staff during this public health crisis. Classes have been modified to Alameda County’s latest safety recommendations and will continue to adapt as things change. If your class is cancelled by The Crucible due to updated county guidance, we are pleased to offer you a refund for a class or session that cannot run.