Gem Junior Mystery Gem Box (International Gem Society)

What's in the box: Each box holds one real rough gemstone, one real faceted gemstone, a puzzle book whose clues reveal the mystery gem, and real gemology tools.

Gem Junior is the kids' subscription from the International Gem Society, a long-running online resource for gem education. Each month's box is built around a mystery gemstone. Your child works through a puzzle book, and every solved puzzle gives a clue to the stone's identity. Each box includes one rough specimen and one faceted stone, so kids can compare a gem as it comes out of the ground with how it looks after cutting and polishing. Real gemology tools come in the box too. The activities cover the history, geology, crystallography and chemistry of each gem, which gives it more substance than a bag of tumbled stones. The series runs to 12 gemstones, so collectors have a clear finish line. There are three subscription plans, but the main pages don't clearly explain how they differ or give an official age range. The puzzles suit school-age children, and younger kids will likely need an adult's help. The site doesn't describe the size or quality grade of the stones, so set expectations accordingly. Once the 12-gem collection is complete, it's unclear what comes next. A referral program offers bonus stones. Overall, this is a thoughtful, education-first gem box from a credible source, and it works best for families who will sit down and do the puzzles together.