Review on 🔬 Measuring Mohs Hardness Kit Specimens by Mark Adams

Definitely not for children because of the risk of asbestos. The Mohs scale has 10 digits. No.10 diamond material is not included, which is normal. I thought #9 would be missing because it's such a tiny piece of stone. I finally found it and canceled my return. #1 is a bag of asbestos talc. I hope no one wraps this as a gift to a school or children without reading the attachments as the online description makes no mention of asbestos. Selling without prior notice to the buyer should be illegal. Sending asbestos through the post can also be illegal. I don't know but this seller should not mislead buyers without giving them proper warning before buying. However, I kept it because I found a tiny number 9 on the packaging. Tiny.