Older Vintage Group of Four Loose Cameos retailer

Older vintage group of four loose cameos. This group was part of an antique dealers collection that were either removed from jewelry or were never mounted. The four pieces all have a black base and two have white and cream colored carvings. I believe the largest to be glass , it has some chipping at the edges and measures one and one eighth of an inch by seven eighths of an inch. The open cut work silhouette measures app. 1'' x .75''. I am not sure what the material is. The oval cameo with retailer the white carving has chipping at the edges measures seven eighths of an inch by five eighths of an inch. And the smallest rectangular cameo measures three eighths of an inch x .5''. These pieces can be mounted, displayed or used for crafts. age appropriate wear with chipping