Effects of Gamma Irradiation on Corundum: Towards a Potential Detection Method
Corundum, encompassing the highly prized ruby and sapphire varieties, stands as a cornerstone of the global gemstone market.
HFSE-enriched sapphires of gem quality: A combined FTIR and trace element study and implications for heat treatment detection
Gem-quality sapphires containing ‘exotic’ elements such as Sn, Nb, Zr, Ta, W, are of special interest in gemmological research, as the concentration of these so-called high-field- strength-elements (HFSE) often correlate with detectable traces of naturally incorporated beryllium (Whatanakul et al. 2004, Par
Väyrynenite of Exceptional Quality and Size, Reportedly from Nigeria
Väyrynenite is an attractive and rare phosphate mineral that—until recently—has been known in gem quality mostly as small, often included stones from northern Pakistan (and less commonly, Afghanistan). Since early 2025, väyrynenite gemstones of exceptional quality and size have entered the market, repor
Species Identification of Coral Jewellery by Genetic Testing: Case Studies, Experiences and Prospects
This article reviews and details how DNA testing can be used to identify species of precious coral used in jewellery. Since certain species are listed by CITES (Convention on Inter- national Trade in Endangered Species of Wild Fauna and Flora), the correct identification of coral species is of utmost importance
Genetic Testing of a High-End ‘Angel Skin’ Precious Coral Necklace Identifies a Species New to the Precious Coral
Genetic Testing of a High-End ‘Angel Skin’ Precious Coral Necklace Identifies a Species New to the Precious Coral Trade and Potentially New to Science. Diversity 2025, 17, 395
Trace DNA from a century‐old holotype specimen resolves taxonomic uncertainties: the case of the Hawaiian pink precious coral
Trace DNA from a century‐old holotype specimen resolves taxonomic uncertainties: the case of the Hawaiian pink precious coral (Pleurocorallium secundum), a CITES‐listed species used in jewelry.
Gemmological Characterisation of Emeralds from Musakashi, Zambia, and Implications for Their Geographic Origin Determination
Gemmological Characterisation of Emeralds from Musakashi, Zambia, and Implications for Their Geographic Origin Determination. Journal of Gemmology, 2024, 39, 4, 338-350.
Afghanite of Exceptional Size and Quality from Badakhshan, Afghanistan
Afghanite of Exceptional Size and Quality from Badakhshan, Afghanistan. Journal of Gemmology, 2024, 39, 1, 7-8.
Dehydration of Diaspore and Goethite during Low-Temperature Heating as Criterion to Separate Unheated from Heated Rubies and Sapphires
Dehydration of Diaspore and Goethite during Low-Temperature Heating as Criterion to Separate Unheated from Heated Rubies and Sapphires. Minerals 2023, 13, 1557.
A study of nickel-bearing type Ia diamonds
A study of nickel-bearing type Ia diamonds. IGC 2023 Proceedings, 37-39.