Original Message:   a better link to the Desautels information

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0CDYQFjAD&url=http%3A%2F%2Flink.springer.com%2Fcontent%2Fpdf%2F10.1007%252F978-1-4684-6572-3_3.pdf&ei=oRQRVMahNsqhigLqrYDgDQ&usg=AFQjCNEG614ItLAmD5bkQQcVU_-g82XZ8A&sig2=Aaw95DnLKk27BPzy6BVk0w This one allows you to read more than just the abstract. Concerns hardness, specific gravity, and refractive index. Copyright 2024 All rights reserved by Bead Collector Network and its users

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