This guide explains how to obtain and utilize the Crystalarium in Stardew Valley, a valuable tool for efficiently producing gemstones and minerals. Note that this guide reflects the 1.6 update and its impact on Crystalarium mechanics.

Obtaining a Crystalarium

The Crystalarium recipe unlocks at Mining Level 9. Crafting requires:

• 99 Stone: Easily obtained by breaking rocks.
• 5 Gold Bars: Smelt Gold Ore (found at mine levels 1-80) using a Furnace and Coal.
• 2 Iridium Bars: Smelt Iridium Ore (found in Skull Cavern or from the Statue of Perfection) using a Furnace and Coal.
• 1 Battery Pack: Obtained by placing a Lightning Rod outside during a thunderstorm.

Alternatively, acquire a Crystalarium by:

• Completing the 25,000g Community Center bundle (Vault).
• Donating at least 50 minerals to the Museum.

Using the Crystalarium

Place the Crystalarium anywhere (indoors or outdoors). Popular locations include the Quarry for mass production.

The Crystalarium replicates any gemstone or mineral (except Prismatic Shards). Quartz has the shortest growth time but low value. Diamonds offer the highest profit despite a 5-day growth time.

To relocate or change the gem being replicated:

• Use an axe or pickaxe to remove the Crystalarium. A gem will drop if one is currently being grown.
• To switch gems, simply interact with the Crystalarium while holding the desired gem. The current gem will be ejected, and the new one will begin growing.

Efficiently utilize the Crystalarium to boost profits and enhance your relationships with Pelican Town's residents by gifting valuable gems.