So did you guess right?
I have been a little naughty, as this is not just one gemstone, but a combination of 4 gemstones:
Rhodochrosite,
Lavender Fluorite,
Quartz, and
Tetrahedrite is said to have the following metaphysical properties fortunate coincidences/fate, adventurous life, organization and orderly thinking, chemistry/cooking alchemy, building stability, circular breathing.