Add Yahoo as a preferred source to see more of our stories on Google. A high school student has been wreaking havoc among his teachers with a $16 gadget that can supposedly tell whether a diamond is ...

Whether it's a family heirloom, a gift, or a personal purchase, a diamond is a significant investment, both financially and emotionally. It's natural to want assurance of its authenticity. While the ...

Forbes contributors publish independent expert analyses and insights. I cover upmarket jewelry, timepieces & ethical, sustainable jewelry. Burnishing its 45-year reputation as a leader in its field, ...