Not only the largest diameter but a

Not only the largest diameter but also quality of diamond is important.

ผลลัพธ์ (อังกฤษ) 2:

钻石的最大直径和质量都很重要。

ผลลัพธ์ (อังกฤษ) 3:

Not only the biggest diamond, but also the quality of the diamond is very important.