A. Table salt is NaCl, which is a crystal.

Granulated sugar is sucrose, and C12H22O11 is a crystal.

Alkali surface is Na2CO3, which is a crystal.

B. Glass is in the amorphous state, not a crystal

Rosin is in the amorphous state, not a crystal

C. Snowflakes, ice, and frost are all H2O and are crystals

D. Gemstones, iron wires, and gold rings are all crystals