I suspect the recipe laid out in https://www.houzz.com/discussions/2842847/container-soils-water-movement-and-retention-xxii will be the most highly recommended. Doesn't answer your custom mix question however, but it kind-of does.

I googled rock dust and found this: https://www.gardenmyths.com/rock-dust-remineralize-earth/, it mentioned Azomite which can be found at this link: https://azomite.com/azomite-home-page/azomite-mineral-fertilizer-products/field-grade-azomite-fertilizer/

I strongly urge you to read the first link funkyhat provided and then perhaps reconsider your plans. What you propose is unlikely to provide you with the best results.