Summary
InStardew Valley, aCrystalariumcan be used to duplicate certain gems and can be crafted using 99Stone, 5Gold Bar, 2Iridium Bar, and 1Battery Pack. The recipe for Crystalariums isacquired at Mining Level 9, but players can receive a Crystalarium as a reward before then for completing the 25,000g Bundle in the Community Center, or for donating 50 items to the Valley Museum.
These machines are highly effective for producing a variety of profitable, valuable, and giftable gemstones. This list ranks the best gems for Crystalariums based on their usefulness, selling price, and production time, allowing players to make informed decisions on gem reproduction.
It is highly recommended that players choose the Gemologist Profession when aiming to profit from gems, as it boosts their selling price by 30%.
10Neptunite
Good Price And Can Be Used As Dye
Neptuniteis a mineral found inMagma GeodeandOmni Geodethat can bedonated to the Valley’s museum. It can also drop from slain Black Slimes in the Slime Hutch at a 5% chance, along withBixite(another donatable mineral).
With a high selling price and a strong gold per day value, Neptunite is a decent choice to place inside Crystalariums. The mineral can also be used for black dye in aSewing Machine, making it fairly versatile compared to other donatable minerals.
9Helvite
Profitable And Creates A Unique Clothing Item
Found inMagma GeodeandOmni Geode,Helviteis a liked gift for theWizardand can be used as red dye in aSewing Machine. It can also be crafted into the Classy Top,a clothing itemthat varies depending on a player’s gender selection.
Helvite has a high selling price and is a better option thanNeptunitebased on the gold per day value.
8Star Shards
A High Selling Price
Star Shardshave the second-highest selling price of all the gems that can be placed inside a Crystalarium. However, it ranks lower due to its limited usefulness beyond generating profit.
Its only other notable uses are as a liked gift for theWizardand its use in theSewing Machine, where it creates the unique Star Shirt. Additionally, it can be used as red dye in the sewing machine. Four Star Shards (along with oneCloth) are needed to make a Star Shirt and dye it completely red.
7Amethyst
A Liked Gift For Almost All Villagers
Amethysthas a significantly lower selling price than the previous entries on this list, but its usefulness and quick production make it generally a better option for players. This gemstone is a loved gift forAbigail,Emily,Clint, and theDwarfand is liked by all the villagers exceptPierre,Leah, andLinus.
Whenimproving a melee weapon in the Volcano Forge, an Amethyst can be used to increase the weapon’s knockback, meaning monsters will recoil further away once hit. Moreover, an Amethyst can appear as part of the Help Wanted requests on the board outside Pierre’s.
6Aquamarine
Useful In The Forge
Loved byClint,Emily, and theDwarf,Aquamarinecan be used in a variety of ways. With a slightly better selling price thanAmethyst, Aquamarine is a good option for Crystalariums in the early game, as they are not too hard to find and cangenerate a great profit.
At the Forge in the Volcano, an Aquamarine can be used to increase the critical hit chance on a melee weapon, making it more likely that the weapon will deal additional damage to enemies. It is also necessary in theMarble Braziercrafting recipe.
5Fire Quartz
Great For Bulk Gifting
Fire Quartzhas a decent gold per day value, as one can be crafted within one in-game day. It is also a liked gift by all the villagers exceptLeah,Linus, andPierre, making it an excellent choice to have in bulk for gifting throughout the valley.
It can be smelted in aFurnacewith oneCoalto make 3Refined Quartz, an essential item for craftingQuality Sprinkler. When aiming for perfection, Fire Quartz is an essential item as it must be given to the museum. It is also used for crafting both theSlime Egg-Pressand theDehydrator.
4Emerald
Use In The Forge Or Sell For A Good Price
AnEmeraldcan be used in the Volcano Forge to increase the speed of a melee weapon, which means attacks and recovery times will be faster. Each point of weapon speed reduces hit time by 40 milliseconds, meaning three Emeralds would reduce the hit time by 120 milliseconds.
Emerald is a liked gift by all exceptLeah,Linus, andPierre, and is loved byPenny,Clint,Emily, and theDwarf. Itshigh selling priceand good gold per day value make it a solid choice to reproduce in Crystalariums.
3Ruby
Trade For Spicy Eel At The Desert Trader
Rubyboth has an excellent selling price and is highly useful. It can be traded at the Desert Trader for aSpicy Eel. This food item provides +1 luck and +1 speed, which is highly valuable when mining in the Skull Cavern.
Furthermore, when used in the Volcano Forge, it can increase attack on a melee weapon. It is a liked or loved gift for all villagers exceptLinus,Leah, andPierrebut can be requested by anyone as part of a Help Wanted quest.
2Jade
Good For A Journey Into The Skull Cavern
With a relatively short crafting time, a multitude of uses, and a high selling price,Jadeis a great option to place in Crystalariums. It is a great giftable item, loved or liked by nearly all villagers, and can also be used as green dye in theSewing Machine.
Its most valuable use, however, is trading at the Desert Trader on Sundays forStaircase, which can help with reaching floor 100 in the Skull Cavern. Where they would usually require 99Stoneto craft, the Desert Trader accepts one Jade per Staircase, which is a worthy investment.
1Diamond
The Highest Selling Price And Most Useful Gem
Paired with its incredibly high selling price,Diamondhas the most uses of all gems available for reproduction through Crystalariums. It is required for several useful crafting recipes, such as theRing of Yoba,Geode Crusher, andFairy Dust. Additionally, it can be requested on the Help Wanted board, offering players a reward of 2,250g and 150 friendship points with the requester. Diamond is a loved gift byEvelyn,Gus,Jodi,Krobus,Marnie,Maru,Penny, andWilly, making it an excellent choice for gifting.
As ofStardew Valley’s 1.6 update, 10 Diamonds can be exchanged forThe Diamond HunterBook at the Volcano. After reading this book, all stones broken with a pickaxe have a 0.66% chance of dropping a Diamond. This item becomes much more accessible if players are already reproducing Diamonds in a Crystalarium, as it takes just 50 days (less than half an in-game year) for a single Crystalarium to produce 10 Diamonds, giving players plenty of time towork towards unlocking Ginger Island.
