Dear colleagues, Could anyone let me know where and how USGS standards BCR-2G and BIR-1G can be bought/obtained? I would need pieces large enough to be used as secondary standards for LA-ICP-MS measurements. Thank you very much, Olivier -- Olivier Namur Website: PetroLab<https://ees.kuleuven.be/project/petrolab> Explore our Research facilities<https://ees.kuleuven.be/project/petrolab/facilities> and Funding opportunities<https://ees.kuleuven.be/project/petrolab/grants-funding-opportunities> Department of Earth and Environmental Sciences | KU Leuven| Belgium