A hardness of 7 indicates that rose quartz is capable of scratching glass and softer minerals, but it can still be scratched by harder materials like corundum (which includes sapphires and rubies) and diamond.

Source: https://www.freepressjournal.in/weekend/rose-quartz-gemstone-of-self-love-and-empathy

He uses strands of Kevlar, carpet fibres, pieces of ceramics, crushed micro pigments, precious metals like gold and platinum as well as gemstones, diamonds, emeralds and rubies to create his miniature artworks.

Source: https://www.dailymail.co.uk/news/article-12914123/Artist-recreates-microscopic-75k-version-Banksys-famous-Girl-Balloon-painting-inside-eye-needle-shredding-just-like-original.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Known locally as the Land of Gems, the area comprises Mogok, Moemeik, Twin Nge, and Thabeikkyin where mines produce rubies, sapphires, peridot and other precious stones.

Source: https://www.irrawaddy.com/news/burma/myanmars-civilian-govt-to-grant-mining-licenses-for-ruby-land.html

Penny was praised for how she handled the huge sword - the Jewelled Sword of Offering - which had a hilt encrusted with diamonds, rubies and emeralds.

Source: https://www.thescottishsun.co.uk/fabulous/10632215/charles-coronation-penny-mordaunt-outfit-dupe/