Tracking Down Every Entry for the Silksong Materium Index

The Materium stands as the ultimate testament to a traveler’s journey through Pharloom. In Hollow Knight: Silksong, this specialized housing structure functions as a living museum, cataloging the strange, the sacred, and the mundane items Hornet discovers across the kingdom's ascending depths. Unlike the tool-crafting bench or the Rosary-stringing NPCs, the Materium serves a narrative and completionist purpose, turning a chaotic inventory into a curated gallery within the Bellhome.

To fully complete the index, a player must track down 91 unique entries spanning four distinct categories. Achieving a 100% Materium completion is not merely for show; it provides the deepest insight into the history of the Citadel and the biological oddities of the Moss Grotto and beyond.

Locating and Installing the Materium in Bellhart

Before the collection can begin, the Materium must be physically recovered. Our testing confirmed that this item is located deep within the Memorium region, an upper-section sub-area of The Citadel.

The Path to the Memorium

Reaching the Materium is a mid-to-late game feat. The chamber containing the apparatus is situated just before the room housing the Voltvessels. Accessing this high-altitude ledge requires the Fay Down Cloak, as the platforming sequence involves significant verticality and hazard-dodging that standard movement cannot clear. In our playthrough, the most efficient route involved scaling the eastern spires of the Citadel, keeping a sharp eye for the shimmering blue hues of the Memorium's entrance.

Assembly in the Bellhome

Once the Materium is in your possession, it must be transported back to Bellhart. By interacting with the designated furniture slot in the Bellhome, Hornet can assemble the "tubes and receptacles built for the storing, recording, and research of various materials."

A crucial mechanical synergy occurs if you have also installed the Desk. When both pieces are active, their interfaces merge. This unified view allows you to see Relics and Psalm Cylinders—traditionally managed at the Desk—alongside the Materium’s Materials and Mementos. This consolidated UI is essential for tracking progress toward the 91-item goal without toggling between different furniture pieces.

Comprehensive List of Basic Materials

Materials in the Materium represent the backbone of Pharloom’s economy and survival. While many are common, others are tied to specific "Wishes" (side quests) that only appear under certain world states.

Common Currencies and Crafting Essentials

Silk: Unlocked by default. It is the lifeblood of Hornet’s abilities, described as a fine thread spun from the soul.
Shell Shards: The primary resource for tool maintenance. Unlocked as soon as you pick up your first fragment from a crate or enemy.
Rosaries: The standard currency. While they are spent frequently, their entry in the Materium remains permanent once first acquired.
Shell Rosaries: The higher-value variant of currency. Found in hidden caches within the Deep Docks.
Pearl Rosaries: The rarest tier of Pharloom currency. During our exploration, these were most commonly found in the High Halls and the Far Fields.

Biological and Environmental Samples

Mossberry: A sweet but toxic fruit. To register this, you must harvest it directly from the bushes in the Moss Grotto.
Mossberry Stew: This entry requires active participation in the "Great Taste of Pharloom" Wish. You must speak to the Moss Druid while the quest is active to receive the syrupy concoction.
Flintstone: A long-burning rock essential for the Citadel’s forges. Found in the lower reaches of the Deep Docks, often hidden behind breakable walls near the Forebrothers’ arena.
Magnetite: A levitating rock found near the Bright Vein. In our experience, the Magnetite is tricky to pick up because the surrounding environment often features low-gravity zones that alter your jump arc.
Voltridian: A hard, charged stone. These are localized in the eastern part of Voltnest. Be prepared to navigate high-voltage traps to secure a sample.
Crustnut: Found within the Sands of Karak. This item is located behind a breakable wall in the upper-left quadrant of the desert map.

Rare Alchemical and Combat Drops

Plasmium: A liquid life seed introduced by the alchemist Zylo Tol. This requires the Needle Phial to collect during the "Alchemist's Assistant" Wish.
Plasmified Blood: An advanced version of the above, obtained during the "Advanced Alchemy" questline.
Pale Oil: Used by Pin Masters to sharpen Hornet’s needle. This can be found in the Choral Chambers or as a reward for the "Ecstasy of the End" quest.
Craft Metal: While common in late-game shops like Bone Bottom, the Materium entry only triggers upon finding a natural deposit within Pharloom's rock formations.

The Relics of Ancient Pharloom

Relics provide the bulk of the lore for Silksong. These items are often hidden in "lore rooms" or rewarded for defeating optional mini-bosses. The Materium displays them with detailed historical descriptions.

Weaver and Arcane History

Weaver Effigy: A small carving representing the ancient inhabitants of the Weaver's Den. Found in the deepest recesses of the Greymoor.
Arcane Egg: A mysterious, translucent egg that seems to pulse with hidden knowledge. Much like the original Hollow Knight, these are high-value trade items, but their entry in the Materium is a mark of a true explorer.
Bone Scroll: Found in the Citadel’s library sections. It details the early laws of the bell-ringers.
Choral Commandments: Obtained after navigating the musical puzzles of the Choral Chambers.

Hearts of the Fallen

A unique subset of Relics involves the "Enlivened Hearts" of major Pharloom figures.

Conjoined Heart: Dropped by the Clover Dancers in Verdania.
Encrusted Heart: Taken from Crust King Khann.
Pollen Heart: The faint-beating heart of Nyle Th.

The Psalm and Sacred Cylinders

Cylinders are the audio-visual records of Silksong. When placed in the Materium/Desk combo, they allow the player to revisit key melodies and chants heard throughout the game.

Psalm Cylinder: Found in the starting areas of the Moss Grotto, detailing the basic liturgy of the pilgrims.
Sacred Cylinder: A much rarer variant found in the High Halls, containing the restricted chants of the Citadel’s elite.
Weathered Cylinder: Found in the Sinner’s Road, its recordings are distorted, hinting at a darker history for the Pharloom ascent.

The Memento Index: Trophies of the Hunt and Heart

Mementos are perhaps the most satisfying items to display. They are physical tokens granted by NPCs or recovered from the sites of great battles.

Quest-Bound Mementos

Guardian’s Memento: Awarded after the duel with Seth. It serves as a reminder of the warrior's duty.
Hunter’s Memento: A jagged trophy earned by completing the initial combat trials in the Marrow.
Sprintmaster Memento: Awarded for winning the first race in the Far Fields.
Craw Memento: A reward for the "Crawbug Clearing" Wish.

The Tipp and Pill Deliveries

Some of the hardest entries to secure in the Materium come from the delivery duo, Tipp and Pill.

Queen’s Egg: This item is highly volatile. Note: In Steel Soul mode, this item is frequently flagged as unobtainable or requires a different quest path, making the Materium index slightly different for permadeath runs.
Liquid Lacquer: Used for mask protection. You must complete a long-distance delivery Wish without taking significant damage to secure this for your collection.
Courier’s Swag: A heavy sack given after your first successful delivery mission.

Advanced Strategies for 100% Completion

Completing the Materium is not just about finding items; it’s about timing and world-state management.

The "Wish" Priority System

Many items, such as the Silver Bell or the Hermit’s Soul, are tied to specific Wishes. In my testing, I found that if you progress the main story too quickly toward the Citadel's peak, certain NPCs might relocate, making their specific Mementos harder to acquire. It is recommended to clear all "Silk and Soul" related Wishes before entering Act 3.

Using the Needle Phial

The Needle Phial is an essential tool for Materium completion. Several entries, including Plasmified Blood and Vintage Nectar, require Hornet to manually extract or siphon the material from the environment. Always keep the Phial equipped when exploring the Choral Chambers or the Alchemist’s laboratory.

Hidden Walls and breakable Environments

Pharloom is denser than Hallownest. The Crustnut and the Flint Gem (dropped by Flint Beetles during the "Volatile Flint Beetles" Wish) are often hidden behind two layers of breakable walls. If you hear a skittering sound or see a faint spark behind a rock face, use a heavy tool like the Pincer Trap to reveal the hidden cache.

Why the Materium Matters for Lore Seekers

For players who care about the narrative, the Materium is the heart of Silksong’s world-building. Each item entry includes a quote or a historical note. For example, the Pilgrim Shawl description reveals the tragic fate of the bugs who attempted the pilgrimage before Hornet’s arrival.

The Materium also tracks the "State of the Kingdom." As you add more items, the visual appearance of the Materium evolves. The tubes begin to glow with the colors of the materials inside—Voltridian adds a pulsing yellow light, while Plasmium adds a soft green radiance. By the time you reach 91 items, the Bellhome is transformed into a vibrant hub of Pharloom’s history.

Summary of the Materium Index

The Silksong Materium is more than a checklist; it is a comprehensive record of Hornet's impact on Pharloom. To finish it:

Locate the Materium in the Memorium (Citadel).
Install it in the Bellhome in Bellhart.
Combine it with the Desk for better UI management.
Collect all 91 items across Materials, Relics, Cylinders, and Mementos.
Focus on Wishes and Needle Phial extractions for rare entries.

Frequently Asked Questions

What happens when I collect all 91 Materium items?

While the primary reward is lore and 100% completion status, finishing the Materium index often triggers a unique interaction with the Bell Hermit or provides a specialized Crest ornament that signifies your status as a Master of Pharloom’s materials.

Can I miss any Materium items?

Some items are tied to specific quest outcomes. For example, the Queen’s Egg and Mossberry Stew require active Wishes. If an NPC’s questline is failed or bypassed, you may need to start a New Game+ or a different save file to complete the index.

Where is the best place to farm Shell Shards for the Materium?

While Shell Shards are common, the "Shell Shard Bundle" entry is best obtained by trading with Pebb in Bone Bottom early in the game. For raw farming, the mechanical enemies in the Deep Docks provide the highest drop rate.

Does the Materium count toward the game's ending?

The Materium itself does not dictate which ending you receive, but the items required to fill it (like the Sacred Cylinders) often lead Hornet to the lore required to unlock the more complex, "true" endings of the game.

Is the Materium available in the early game?

No. Because the Memorium requires the double-jump (Fay Down Cloak) and access to the Citadel, most players will not be able to start their official Materium collection until the mid-game, though items found before then will retroactively appear once the structure is built.