O Guia Definitivo para a Autenticidade de Cristais

Honestly, I've spent years second-guessing which of my stones were real, and this guide finally makes the verification process straightforward. The practical steps are easy to follow even when you're just using a magnifying loupe and natural light. Worth every cent for the peace of mind it's given m

I finally understand why some of my "citrine" pieces looked off — the heat-treated amethyst section explained it perfectly. Wish the photos were a bit larger since I read this mostly on my phone, but the breakdown of refractive index tests was genuinely useful for checking my collection.

The section on spotting dyed agate versus natural banding was genuinely useful — I checked three stones in my collection and found one fake. I wish the photos were a bit larger, but for the price it's a solid reference I'll keep coming back to.