'Rare' in the Bible

You did not [even] anoint My head with [ordinary] oil, but she has anointed My feet with [costly and rare] perfume.

Then Mary took a pound of very expensive perfume of pure nard, and she poured it on Jesus’ feet and wiped His feet with her hair; and the house was filled with the fragrance of the perfume.

For it is rare for anyone to die for a righteous person, though somebody might be brave enough to die for a good person.

Through faith the child Moses was hid for three months by his parents, because they saw his rare beauty; and the king's edict had no terror for them.

cargoes of gold and silver, of jewels and pearls, of fine linen, purple and silk, and of scarlet stuff; all kinds of rare woods, and all kinds of goods in ivory and in very costly wood, in bronze, steel and marble.

having God’s glory [filled with His radiant light]. The brilliance of it resembled a rare and very precious jewel, like jasper, shining and clear as crystal.