I have been a Fire Mountain Gems customer for well over 10 years. FMG is my go-to supplier because I need to know exactly what I am buying. Gemstone descriptions include type, substance, treatment, grade, size, cut, Mohs hardness, and quantity -- descriptors are defined in the resources section. All other products (a comprehensive list of crafters' needs) are similarly detailed. Resources include definitions, charts, designs, demonstrations, instructions, adhesives/cleaners/polishers uses and cautions, Q&A solutions, and just about anything a crafter needs to know. On the very few times I have had a problem with an order, the situation was resolved in a timely manner and to my satisfaction. I craft for personal use, many gifts, and some sales. Fire Mountain Gems has never disappointed me.