Crucible Small 235×320 Medium 469×640 Large 751×1024 Download Tiff Original 1760×2400 | (735.2 KB) Description A crucible is a cup-shaped piece of laboratory object laboratory equipment used to contain chemical compounds when heating them to very high temperatures. Crucibles are available in several sizes and typically come with a crucible cover (or lid). Keywords Crucible, cup-shaped, laboratory equipment Galleries Chemistry Apparatus Source: L. Brent Vaughan Hill's Practical Reference Library Volume II (NewYork, NY: Dixon, Hanson and Company, 1906)