A shipping calendar with a shortlist attached: last order dates by destination, four budgets, and what not to give in December.
The same mineral family, the same hardness, often the same red: a torch test that settles it, and what each stone is best for.
Both quartz, both Mohs 7, completely different jobs: colour, meaning, fading and the cases where the answer is both.
Same family, same hardness, different look: how to tell moonstone from labradorite in ten seconds, and which one to buy.
What tiger’s eye is worn for, why blue hawk’s eye costs more, and how to spot glass fakes with a painted stripe.
What 茶晶 is worn for, why smoky topaz is a misnomer, and how to choose a dark stone that still looks like jewellery.