https://www.google.com/search?q=stone+setting+pdf&rlz=1C1CHFX_enUS633US634&oq=stone+setting+pdf&aqs=chrome..69i57j0l2.3
269j0j7&sourceid=chrome&ie=UTF-8

The gems are cut with angles that reflect the light entering mainly from the
table and reflected by the facets of the pavilion.

The prongs hold the gem into the setting by tension.
All else is mostly aesthetics and an attempt to reduce rubbing, chipping, and
loosening of the gem in the setting.

Good work so far - glad you got your laptop problems sorted out!   :)

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