If you’re going to target any specific gems, then multipliers are the ones.
http://forum.spolokmedikovke.sk/viewtopic.php?f=21&t=1048837
http://horsecity.ru/phpBB3/viewtopic.php?f=2&t=455419
http://kiteonly12.free.fr/viewtopic.php?f=11&t=125331
http://forum.spolokmedikovke.sk/viewtopic.php?f=12&t=1194124
http://forum3.bandingklub.cz/viewtopic.php?f=32&t=1444391
http://forum.bandingklub.cz/viewtopic.php?f=28&t=1614270
https://woman-life.ucoz.com/forum/43-161-90#10443
http://forum3.bandingklub.cz/viewtopic.php?f=53&t=1588018
https://ufr-2020.front5.picapo.net/forums/viewtopic.php?pid=313319
http://forum.spolokmedikovke.sk/viewtopic.php?f=24&t=1069073
http://www.lada-xray.net/showthread.php?p=214569#post214569
http://biopharmamash.com/viewtopic.php?t=1575046