These were Not tested. I do not know what they are made of. They are very light weight. Each domino weighs 0.5 oz.
Vtg 50's Crisloid Top Grade Bakelite Butterscotch Dominoes Set In Box with Rules
VTG 1940’s Double 6 Dominoes Bakelite Butterscotch w/Case Complete Set/28
Vtg Mahjong Butterscotch Bakelite Mah Jong Tile Chunky Stretch Bracelet 7 Tiles
Vtg Mahjong Butterscotch Bakelite Chunky Stretch Bracelet 7 Tiles + Black Beads
Kids Dominoes Game Set 28 Tile Colored Dots Double Six Educational Game Set
Vintage Dominoes With Colored Dots Set Of 28 Made Germany Original Box
