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Stardew Valley: How To Get & Use The Crystalarium

By JackJan 29,2025

This guide explains how to obtain and utilize the Crystalarium in Stardew Valley, a tool for efficiently producing gemstones and minerals. The 1.6 update introduced minor changes to its functionality, particularly regarding relocation and stone replacement.

Obtaining a Crystalarium

Crystalarium Crafting Recipe

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

  • 99 Stone
  • 5 Gold Bars (forged from Gold Ore)
  • 2 Iridium Bars (forged from Iridium Ore)
  • 1 Battery Pack (obtained from a lightning rod struck by lightning)

Alternatively, you can obtain a Crystalarium by:

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

Using the Crystalarium

Crystalarium in Use

Place the Crystalarium anywhere (indoors or outdoors). Popular locations include the Quarry for creating a "crystal farm."

The Crystalarium replicates any mineral or gemstone except Prismatic Shards. Quartz has the shortest growth time but low value. Diamonds have the longest (5 days) but highest value.

To move a Crystalarium, hit it with an axe or pickaxe. Any gem currently being replicated will drop. To change the gem being replicated, simply interact with the Crystalarium while holding the desired gem. The current gem will be ejected, and the new one will begin replicating.

Profit from your Crystalarium by producing high-value gems like Diamonds. These also make excellent gifts for Pelican Town's residents.

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