There are multiple ways to quickly farm Gems in Atelier Ryza. In the mid game, the easiest method is by reducing ingredients.  Later on, reducing items becomes the more efficient method. Certain items, like the Philosopher’s Stone, give a good amount of Gems.

Gems aren’t particularly useful in the mid game. As you progress, they become much more important, especially to maximize your gear. Gems can also be used to multiply items. Multiplying items will make farming Gems easier and faster as well as help you save on ingredients.

Farming Gems in the Mid Game

The most reliable method to farm Gems in the mid game is by reducing ingredients.

At this point, Gems aren’t particularly important. You should focus your time – and especially your resources – in raising your Alchemy Level. However, you can already farm Gems if you wish to do so.

Reducing Ingredients

Tree logs and water are the best ingredients to farm Gems. The Maple Delta is one of the locations where you can gather tree logs for Gem farming. Fast travel to Maple Delta – Sweet River and use the Woodcutter’s Axe to gather ingredients.

You can also fast travel to Traveller’s Road – Limewick Hill and gather material from the trees there.

As an alternative, you can also reduce water into Gems. The best points to gather water at are the Weissberg Volcano, Ryza’s Atelier and the Maple Delta. At the Weissberg Volcano, you will be able to gather Foamy Water.

Fast travel to Weissberg Volcano – Iron Race Summit. Head over to the water gathering point to the east and collect Foamy Water.

You will also be able to collect Clean Water from the lake or from the well outside Ryza’s Atelier.

For the third location, fast travel to Maple Delta – Fragrant Tree Forest. Head over to the water gathering point on the north end of the map and collect Roteswasser Tonic.

After collecting the ingredients, head inside the Atelier. Use the cauldron and select “Gem Reduction”. Next, choose the materials you want to reduce into Gems and confirm.

Fragrant Honey Tree, Foamy Water and Tough Log will give the most Gems.

Farming Gems in the Late Game

In the late game, the easiest way to farm Gems is by Multiplying and then reducing items you synthesize. This method becomes available from chapter 6 – The Abandoned Tower, part 3, ownwards. It requires the Multiplicauldron.

Gem farming becomes more important from this point on as you will be able to significantly upgrade your gear using Gems. This will be particularly useful against the Ravaging Queen.

The “Synth Quantity +” Method

You can use this method with all ingredients that contain the “Synth Quantity +” effect. The list includes:

• Zettel.
• Poison Cube.
• Eltz Sugar.
• Delphi Rose Incense.

In the Zettel recipe, the Effect 2 loop at the bottom will add Synth Quantity +1 at Fire Element Level 3. This loop requires a Supplement-type ingredient.

For Eltz Sugar, the Effect 2 loop on the right side adds Synth Quantity + 1 at Wind Element Level 3. This loop requires Honey.

In the Delphi Rose Incense recipe, there are two Effect 2 loops on the left side. The first one will add Synth Quantity +1 with a Beehive-type ingredient at Fire Element Level 2.

The second loop will add Synth Quantity +2 with a Rosen Leaf, requiring Fire Element Level 3.

Poison Cube also has two Effect 2 loops, both on the left side of the recipe. 

The first one adds Synth Quantity +1 at Fire Element Level 2 with a Poison-type ingredient.

For the second loop, you will need to use Flour as an ingredient, with Lightning Element Level 3. This loop adds Synth Quantity +2.

Consider how many ingredients you will need and how many resources you can commit. Choose the item with the best cost-benefit.

After synthesizing one of these recipes, you will need to multiply the item. Multiplying items will cost a few Gems as an investment. Make sure you have enough Gems to create nine copies of the chosen item.

Eltz Sugar is the cheapest option, costing 216 Gems per unit to multiply. Zettel comes next at 588 Gems. Multiplying a Poison Cube costs 1,600 Gems. The Delphi Rose Incense requires 2,356 Gems per unit.

Keep the items to the lowest possible Element Level as multiplying items with a higher Element Level requires more Gems.

Next, use the multiplied item as an ingredient in any recipe. Insert as many as possible to maximize the “Synth Quantity +” effect.

By doing this, you will be able to synthesize multiple items in one go.

For the final step, reduce the items you synthesized. With this, you will obtain enough Gems to make up for your initial investment.

Eltz Sugar and Zettel are usually considered the best options for this method. Both are easy to synthesize and cheap to multiply.

Farming Gems in the Postgame

In the postgame, you will once again rely on reducing items to farm Gems.

Reducing Philosopher’s Stones

Using the Philosopher’s Stone is the best method to farm Gems in Atelier Ryza. It becomes available once you defeat the Ravaging Queen. After beating the final boss, you will be able to synthesize the Red Stone. Like the ingredients mentioned earlier, Red Stone also has a Synth Quantity + effect.

The Effect 1 loop adds Synth Quantity +1 at Fire Element Level 4. This loop requires an Underworld Core.

The second Effect 1 loop adds Synth Quantity +2, requiring a Holy Drop and Lightning Element Level 6.

This process follows the same logic from earlier.

Start by synthesizing at least one Red Stone with Synth Quantity +2.

After that, use the Multiplicauldron and create another nine Red Stones. Multiplying a Red Stone costs 27,500 Gems per unit at the lowest Element Level.

Next, use the Red Stones to synthesize multiple Philosopher’s Stones. 

Add as many Red Stones as possible to the Philosopher’s Stone’s Quality loop. Doing so will allow you to create multiple Philosopher’s Stone in one go.

Once you’ve used up all ingredients, synthesize the Philosopher’s Stones.

After that, reduce your Philosopher’s Stones and reduce them into Gems. 

Each individual Red Stone will produce two Philosopher’s Stone. This way, you are guaranteed to profit, since each Philosopher’s Stone will easily yield over 13,750 Gems.

Remember to always save at least one Red Stone to repeat the process.

With this method, you will be able to farm the maximum of 9,999,999 Gems in very little time.