a) must be talc b) is softer than a diamond c) is Bay12Rupp Bay12Rupp 02/25/2019 Biology High School answered A penny can scratch an unknown mineral. The mineral _____. a) must be talc b) is softer than a diamond c) is harder than a diamond d) has perfect cleavage 2 See answers Advertisement Advertisement Brainly Jul 20, 2022 · Talc chemical formula: Mg 3 Si 4 O 10 (OH) 2 Talc hardness: 1 on Mohs scale Color of talc: Talc minerals are colorless, white, green, brown or gray. Talc powders are white or gray. Transparency: Translucent Talc luster: Vitreous and pearly Morphology: Euhedral crystals are extremely rare, usually found in platy, foliated to fine-grainedpact masses, sometimes c r patil. Apr 29, 2022 · Talc. Talc is the softest known mineral on earth anduding chalk, crayons, paint, rubber, cosmetics, ceramics and pharmaceuticals. Most famously, manufacturers use this mineral for making talcum powder monly marketed as baby powder).. May 11, 2022 · A federal appeals court has agreed to review Johnson & Published: Jul 11, talc free and phthalate free, and sweep the brush across the face to set makeup, alkyl sulfates, As this list will show, sometime it's wavy) that gets tangled VERY easily, detangling conditioner without too much fragrance, 4 out of 5 stars (584) $ 18.95. Omiana Titanium Dioxide-Free and Mica-Free Makeup. . .