良質

1. Origins, structure, and basic meaning

• Structure: 良質, read りょうしつ, combines 良, good, with 質, quality.
• Basic usage: It evaluates the quality of a material or resource and commonly modifies a following noun.

2. Common pitfalls and similar expressions

• Modification with な
  • The examples use 良質な木材 and 良質な水, placing な before the noun being evaluated.
• Quality, not quantity
  • 良質 says that the quality is good. Abundance or a large amount requires separate wording such as the 豊富 in the water example.