Studi Pertanggungjawaban Gemolog Terhadap Sertifikat Batu Permata yang Diterbitkan sebagai Dasar untuk Tinjauan Kasus Jual Beli Batu Permata di Indonesia India dan Amerika Serikat = Gemmologist Accountability Study on Gemstone Certificates Issued as a Basis for Reviewing Cases of Buying and Selling Gemstones in Indonesia India and The United States

Gems: their sources, descriptions and identification/Robert Webster, revised by B.W. Anderson.

Dictionary of gemmology

Persebaran pengrajin batu mulia di Desa Datarnangka Kecamatan Sagaranten Kabupaten Sukabumi = The spatial dissemination of gemstone Craftsmans in Datarnangka Village Aagaranten sub District Sukabumi Regency

Friendship and world peace: stones from universities throughout the world