Assertion: opal's structure | /r/HasProperty | internal
Facets:
Source sentences:
text: Some opal also has an internal structure that consists of regularly packed spheres, which enables it to behave like a diffraction grating and separate light into its component colors - similar to what is done by a prism.
text: Opal can seep into some materials and then harden throughout the structure, opalising the internal structure of what it has infused.
text: Precious opal shows a variable interplay of internal colors, and though it is a mineraloid, it has an internal structure.
text: Precious opal shows a variable interplay of internal colors, and though it is a mineraloid, it has an internal structure.
text: Precious opal shows a variable interplay of internal colors, and though it is a mineraloid, it has an internal structure.