Talk:Gems/@comment-84.35.111.38-20130624080300/@comment-3991817-20130624103409

The small emerald will increase the income for that building with 5%. A totem of prosperity increases income for every building with 10%. These increments amplify, so the income of the building with the gem will be 1 * 1.1 * 1.05 = 1.155 times as much, which is an increase of 15.5%.