Collection
Stamp case Description
Ruby
Ruby Chest
Contains 6 Stamps.
At least one of the Stamps you receive from the Stamp case will be a missing (new) one.
Among the missing Stamps, priority is given to those sets where only one Stamp is missing.

At least one of the Stamps you receive from the Stamp case will be Rare (3 Gems) or higher.
This means that the guaranteed Rare Stamp and the guaranteed missing Stamp might be the same Stamp.
Golden
Golden Chest
Contains 6 stamps.
At least one of the Stamps you receive from the Stamp case will be Rare (3 Gems) or higher.
The chance of getting a missing (new) stamp from the Golden Stamp case increases if you haven’t received one yet:

• after 2 Stamp cases— 40% chance,
• after 3 Stamp cases— 80% chance,
• after 4 Stamp cases — 100% chance (guaranteed).

The Stamp cases don’t need to be opened one after another — the count starts from the last time you received a missing stamp from a Golden Stamp case.
Silver
Silver Chest
Contains 4 stamps.
Green
Green Chest
Contains 3 stamps.
Wooden
Wooden Chest
Contains 2 stamps.
Season* Stamp Rarity Base Probability**
Basic Frequent stamp for 1 gem 31.78%
Regular stamp for 2 gems25.33%
A rare stamp for 3 gems21.50%
A very rare stamp for 4 gems11.21%
Unique stamp for 5 gems10.28%
Great Frequent stamp for 1 gem 41.56%
Regular stamp for 2 gems30.26%
A rare stamp for 3 gems15.46%
A very rare stamp for 4 gems7.33%
Unique stamp for 5 gems5.38%
* Each season is divided into "Basic" and "Great". The chances of obtaining stamps depend on the season that is running.

** The probability is preliminary and changes with each stamp obtained. The selection of a specific stamp of a certain rarity depends on its availability in the overall stamp pool. As stamps are obtained, their quantity in the pool decreases, which dynamically affects the chance of getting duplicates or specific missing stamps.