|Large Diamond Vault|
The Large Diamond Vault and the Small Diamond Vault are not only sharing the same Upgrade-Table of Collectibles but are also both NOT effected by a Waterfront Bonus or nearby Population. This one provides between two and fifteen diamonds when you collect after the 24h running time.
(Personal remark: After obtaining one for about a month, I received 2 times 15 diamonds. Most of the time it provides between 2 and 5 diamonds)