Black Size 1 terrazzo glass can be used for countertops, concrete, DIY Projects, glass aggregates. Terrazzo glass goes through rigorous tumbling processes in order to ensure precise sizing. Our terrazzo glass is 100% recycled glass made in the USA. Glass can be used for terrazzo, countertops, aquariums, aquarium gravel, swimming pools, flower, arrangements, flower arranging and more. Specifications. Color Black. Size Size 1 1/8 1/4. Weight 25 lbs