You can't because you're not supposed to. If nobody has told you, Chaos black and Quartz version are FAKES!!!!!! They were illegal copies of Firered, Leafgreen and Emerald modified but as modified...
Quartz is a naturally occurring silicate mineral composed of silicon dioxide (SiO2). Its hardness is 7 on the Mohs scale and it is in the trigonal crystal system. Quartz possesses a glassy luster and...
topaz has a hardness of 8 on the mohs hardness scale, quartz has a hardness of 7. topaz will be able to scratch quartz, but quartz can never scratch topaz.