rokci -rok-ro'i- gismu

x₁ is a quantity of/is made of/contains rock/stone of type/composition x₂ from location x₃.

x₂: composition including x₂, which need not be complete specification. See also kunra, jemna, canre.

In notes:

canre: x₁ is a quantity of/contains/is made of sand/grit from source x₂ of composition including x₃.
jemna: x₁ is a gem/polished stone/pearl of type x₂ from gemstone/material/source x₃.
kunra: x₁ is/contains/is made from a mineral/ore of type/metal x₂ mined from location/lode/mine x₃.
cnadakfu: d₁=c₁ is a chisel for carving d₂=c₂ with blade of material d₃.
roksfe: s₁ is a rock face / rock surface of rock / mountain s₂=r₁ on side s₃ with edges s₄.
rokske: s₁=r₁ is petrology [science about rock/stone] based on methodology s₃.
rokyko'a: r₁=k₁ is a cornerstone of structure k₂ of stone type/composition k₃=r₂.
amtisti: x₁ is a quantity of/contains/is made of amethyst from source x₂.