Find your Precasia Realmstone: jungle archaeology

Checked edition: Minecraft 1.21.1 / AoA 3.7.16.1. This route is grounded in the released archaeology loot table and the exact configured/placed feature that assigns it. Do not substitute an older release's realmstone challenge.

What you are looking for

The target is Suspicious Gravel generated by AoA's jungle gravel feature, not ordinary gravel anywhere in the world. That feature assigns the aoa3:archaeology/jungle_gravel loot table, which includes a Precasia Realmstone among its possible rewards.

A plain-looking block with the right name can still have a different loot table. Vanilla archaeology sites and modded structures are not automatically the same source.

Bring these supplies

• A brush for archaeology
• Food, lighting and ordinary exploration tools
• Spare inventory space for rewards
• A marked route back to your portal frame

This is a preparation recommendation, not a crafting recipe for the realmstone. The inspected acquisition route is loot-based.

1. Search an Overworld jungle

The released biome modifier requires the Overworld biome tag and a jungle biome tag. A modded biome may qualify through tags, but its name alone does not establish compatibility. World-generation overrides can change the result.

Explore terrain generated with this AoA release and the relevant data enabled. If an area predates those world-generation definitions, do not assume installing the mod retroactively added the feature there.

2. Inspect near the surface, not only deep caves

The placed feature starts from the world-surface heightmap and applies a vertical offset of −3 to −1 blocks. Its configured targets are dirt-tag and grass-tag blocks, replacing eligible targets with Suspicious Gravel.

This is a world-generation rule, not a guarantee that every jungle surface has a deposit. The placement count is randomly 0 or 1, and the configured cluster size is 5; neither value means every searched patch contains five successful blocks.

Work carefully around suspicious blocks. The goal is to brush the archaeology block, not mine it like ordinary gravel or let it fall while clearing the area.

3. Brush and inspect each reward

Use the brush on the Suspicious Gravel and let the brushing action complete. A Precasia Realmstone is one possible result. Other entries in this exact table include pottery sherds, mossy cobblestone, a silver coin, jade, a stick and a bone.

Getting one of those alternatives does not prove the location is wrong. Conversely, getting common items is not sufficient by itself to prove this exact table is attached; the feature/loot evidence is the reliable reference.

Do not budget a guaranteed number of attempts. The table is randomized and modpacks can replace it.

4. Use the realmstone with your finished portal

Return to the 5 × 6 Ancient Rock/rune frame. Confirm the Power rune is at bottom centre and the opening is clear. Use the Precasia Realmstone on the Power rune.

Build the frame step by step · Prepare for your first expedition

If you are stuck

Symptom	Useful next check
Only ordinary gravel	Check the jungle/Overworld tags and near-surface feature placement; ordinary gravel is not the archaeology target
No deposits in old explored terrain	Compare a newly generated area with the same seed/settings; do not destroy an existing world to test a hypothesis
Repeated alternative rewards	Random rewards are expected; verify the actual loot-table source if your modpack provides inspection tools
The realmstone exists in the wiki but not in your version	Check the Minecraft/AoA pair before applying this route
Portal does not activate	Recheck the frame, Power rune, destination support and modpack changes

Exact artifact evidence

• data/aoa3/neoforge/biome_modifier/ore_brushable_jungle_gravel.json: biome selectors and feature insertion
• data/aoa3/worldgen/configured_feature/ore_brushable_jungle_gravel.json: Suspicious Gravel replacement and assigned archaeology table
• data/aoa3/worldgen/placed_feature/ore_brushable_jungle_gravel.json: count, surface heightmap and vertical offset
• data/aoa3/loot_table/archaeology/jungle_gravel.json: reward entries
• data/aoa3/advancement/overworld/the_fossilised_key.json: inventory criterion for obtaining the realmstone

These are independently summarized artifact definitions. Custom Java feature behavior and live world generation have not been newly play-tested in this documentation pass. No copied upstream guide is presented as original work.

Plan the expedition after arrival

Precasia habitat and height checks explains seven monster spawn paths, including Attercopus’s split branch and Spinoledon’s separate altitude bands. Use it with the bestiary; passing a height predicate is not a guarantee of a spawn or a safe travel route.