crystalate was based on bonzoline, a plastic produced by john wesley hyatt's us-based albany billiard ball company. burt, a former albany employee, began manufacturing what was essentially bonzoline in the uk in 1900 as crystalate with percy warnford-davis, under the endolithic name. while crystalate as a plastic material is obsolete and no longer manufactured, like celluloid and bakelite it is commonly encountered by collectors of vintage and antique goods, because many products were made using the substance. the plastic was even mandated in the uk for making billiard balls by the billiards association and control council in 1926.