re: Non-crystalline material?
"What matters is the "external" shape of each inclusion. They have definite sharp edges - look at how jms and I trade descriptions such as "arrow" "keyhole" "wedge". We're seeing cross-sections of what were original crystals in this rock. They may have subsequently been altered or entirely replaced as the original minerals broke down. But the shapes of their boundaries are preserved in the rock."
I don't agree with your interpretation here. They have more of a "roundish" appearance than angular or wedge shaped. The appearance is either of flow or a soft material pressed into hollows.
The dark material could have been melted at high temperature if the rock was a meteorite and they melted on impact.
Bob Clark