All our stones are certified by the GIA (Gemological Institute of America), the global benchmark for gemstone analysis, authentication, and classification.

This independent certification attests to the authenticity, quality, and exact characteristics of each stone.

Beyond gemological excellence, ethics is at the heart of our commitment.

Our stones come from responsible sources that respect human, environmental, and social conditions, excluding any abusive exploitation or high-risk areas.

Choosing Nishene means choosing transparent, responsible, and sustainable jewelry, where each stone tells a story of precision, respect, and integrity.