You will receive 1 OZ R-41 dark blue shard or confetti. This glass shard has COE of 96 and is transparent. You can use it with COE104 glass; as long as you keep the volume of shard to glass ratio at 5%.
I like to swirl and encase it with other COE 96 and raku shards in clear (COE 96) to create faux boro effect. These shards are fragile and prone to breakage. The size can range from 1/4" to 1+".