質 is a traditional Chinese hanzi, listed here under the keyword “matter”. It is built from 斦 (斦) and 貝 (sea shell). It appears as a component in 8 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “斦” + “sea shell”. 質 is among the results, together with every other character containing the same shapes.
Open 質 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.