Assertion: gecko's egg | /r/HasProperty | hard-shelled
Facets:
Source sentences:
text: Most species are oviparous, the eggs being white and hard-shelled and usually laid beneath the bark of trees or attached to the underside of leaves.
text: The eggs are hard-shelled and require a high diet of calcium to produce.
text: The eggs are hard-shelled and require a lot of calcium to produce.