Ive been wondering if their apperance is totally random per player or is it same for everyone. Also if conditions are exactly the same.
So i ran into lvl 30 BTM Logging node with extra yield in Middle La Noscea - if i remember correctly the condition for it was 119> Fire Resist. Quite helpful then it comes to shard gathering least you can get some more with Wards.
Maybe if other nodes like that exist somehwere making a compiled list could be good idea cause at least on my server shard prices are completely out of control in some cases even 70 gil per shard.
Edit: found another to the list. It seems that conditions are corresponding always with shard/crystal type.
Extra Yield nodes:
BTM - Logging lvl 30 Middle La Noscea - Fork on the road more less in middle of map - Fire Shards
BTM - Logging lvl 30 Central Thanalan - Close to East Exit of Uldah - Lightning Shards
BTM - Logging lvl 30 Central Shround - Exit to South Shroud - Wind Shards
BTM - Logging lvl 30 South Shroud - Just outside Buscarrons - Ice Shards
MIN - Quarrying lvl 30 West Thanalan - Nophica Wells Canyon - Water Shards
MIN - Mining lvl 30 East Thanalan - Past Highbridge -