Scratch This Blue Crystal Up-and-Down and a Nail Cuts It—Turn 90° Sideways and Steel Skids Right Off: Kyanite's Dual Hardness (Mohs 4.5 vs. 7.0), Diamond's Soft Direction &...
“Why does blue Kyanite have a Mohs hardness of 4.5 when scratched lengthwise, yet jump to Mohs 7.0 when scratched 90° sideways on the exact same face?”
Jump to Highlight ↗
Why does blue Kyanite have a Mohs hardness of 4.5 when scratched lengthwise, yet jump to Mohs 7.0 when scratched 90° sideways on the exact same face? Discover how cutters polish Mohs-10 Diamonds along their soft [100] direction, bust fake Howlite Turquoise, and weigh SG 7.0 crystals in 60FPS.
Creator Trophy & Press Kit
Featured on Storesso
Are you the creator of gemsmakers.com? Share your verified feature badge on your website, or export a custom 4:5 editorial social card for Instagram and X.
4:5 Social Studio
Generate a 1080?1350 vertical high-res feature card tailored for social sharing.
Instagram & X Feature Card
Export a polished, high-resolution 4:5 editorial graphic displaying your verified inclusion in the Storesso Discovery Index. Perfect for launch threads, founder updates, and newsletters.
Rendered at 1080?1350px (Retina ready) ? No attribution watermark required.
