The latter usually stays protected by its setting on your 1.5-
carat pear-shaped diamond ring, while the girdle stays exposed.
A
diamond can be more vulnerable based on where you wear it. A
ring-set diamond, for example, is bound to take a more severe beating than one on an earring. Moreover, the setting can influence the degree to which your
diamond is exposed to knocks, with
tension settings being the most unwise choice from that perspective.
Bezels offer the best protection for the girdle and any pointy parts the
stone may have based on its
cut.
If you do get your
diamond damaged somehow, there is the option of re-cutting it
to offset the damage, usually without substantial weight loss. Some
ring insurers would even replace the damaged
diamond for you, although the chipped
diamond would have to be given up.
The latter usually stays protected by its setting on your 1.5-carat pear-shaped diamond ring, while the girdle stays exposed.
A diamond can be more vulnerable based on where you wear it. A ring-set diamond, for example, is bound to take a more severe beating than one on an earring. Moreover, the setting can influence the degree to which your diamond is exposed to knocks, with tension settings being the most unwise choice from that perspective. Bezels offer the best protection for the girdle and any pointy parts the stone may have based on its cut.
If you do get your diamond damaged somehow, there is the option of re-cutting it 
to offset the damage, usually without substantial weight loss. Some ring insurers would even replace the damaged diamond for you, although the chipped diamond would have to be given up.
