| OP | the visual property of something having a milky brightness |
|---|---|
| OP | having a play of lustrous rainbow-like colors |
| OP | having a play of lustrous rainbow-like colors |
| OP | replace or convert into opal |
| OP | make opalescent |
| OP | replace or convert into opal |
| OP | make opalescent |
| OP | not clear |
| OP | not clearly understood or expressed |
| OP | a gemstone that is opaque |
| OP | in an opaque manner |
| OP | the quality of being opaque to a degree |