User blog comment:Regimango/I have a question for y'all/@comment-26293141-20160902200158

Laguna Agate was in a bubble made by Blue Agate and left on a ship that didn't make it off Earth due to Carnelian, meaning she was protected from the blast like Bismuth.

Carnelian was in the desert when the blast went off and corrupted.

Kunzite, Green Beryl, Spiderweb Opal, Hübnerite, and Black Star Diopside (name drops) were all in South America when the blast happened, causing the five of them to roam the continent for 5,000 years.

Blue Agate, Blue Topaz, Rubies: Seeker and Valor made it off with many of Blue Diamond's aristocrat gems.

Golden Beryl was on Imperial Topaz's ship along with an Amethyst and Citrine.

Finally, Tanzanite was not even made yet.