Materium

Materium
Tubes and receptacles built for the storing, recording and research of various materials. The Materium can be assembled in a home.
Source	Memorium

The Materium is an item in Hollow Knight: Silksong. It can be used to display various items and materials in Hornet's Bellhome.

Use

After Hornet acquires the Materium, it can be brought to the Bellhome and assembled to be used to record various Materials and Mementos Hornet has found throughout her journey.

If both the Materium and the Desk are installed, then the two furnishings combine, allowing the Desk's Relics and Psalm Cylinders to be viewable in the same window as the Materium's Materials and Mementos.

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  Location in Bellhart

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  Materium in Bellhome in Bellhart

How to Acquire

The Materium can be found in the upper part of the Memorium, in the room before the room containing the Voltvessels.

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  Location in the Memorium

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  Materium in the Memorium

Displayed Items

Materium

Appearance	Description	Location
Silk	Fine thread spun from the soul of its creator. Highly coveted for its remarkable strength and mystical properties. Used to heal wounds, extend life and weave powerful runes.	Entry unlocked by default.
Shell Shards	Hardened fragments of shell and bone, used in the crafting of tools and traps.	Unlocked after picking up a Shell Shard.
Rosaries	Beads carved from various materials, used as a measure of faith and traded as currency. Each is etched with a fine patterned design.	Unlocked after picking up a Rosary.
Shell Rosaries	Beads carved from polished shell. The finer material reflects their increased value.	Unlocked after picking up a Shell Rosary.
Pearl Rosaries	Gleaming pearl carved over with intricate markings. The rarest and most highly valued rosaries in all of Pharloom.	Unlocked after picking up a Pearl Rosary.
Mossberry	Sweet fruit that grows in moist environments. Its seeds are toxic to most creatures.	See Mossberry: How to Acquire.
Mossberry Stew	Thick, syrupy soup of Mossberries and druidic herbs. Sweet and aromatic, but poisonous to most creatures.	Given by Moss Druid during the Great Taste of Pharloom wish.
Pilgrim Shawl	Simple garment worn by several pilgrims over the ages. Torn, tattered and repaired many times over.	Obtained from the corpses of slain pilgrims during the Garb of the Pilgrims wish.
Flintstone	Long burning rock from the base of Pharloom. Mined and used by the Citadel in its forgings.	Found in the lower half of Deep Docks.
Flintgem	Gem-like organ taken from a Flintbeetle. Produces incendiary sparks when abraded, and may explode if cracked or dropped.	Dropped by slain Flintbeetles, which only appear in the Marrow during Volatile Flintbeetles wish.
Craftmetal	Rare element found naturally within the rock and bone of Pharloom. Used by skilled craftsbugs in the construction of tools and trinkets.	See Craftmetal: How to Acquire.
Spine Core	Flexible fibre from within a Hoker's spine. Can be woven into garments and accessories by a skilled seamstress.	Dropped by Hokers during the Flexile Spines wish.
Crown Fragment	Large spike of bone collected from a defeated Skull Tyrant.	Dropped by Skull Tyrant during The Terrible Tyrant wish.
Horn Fragment	Hardened chunk of horned shell collected from a defeated Savage Beastfly.	Dropped by Savage Beastfly during the Savage Beastfly wish.
Silver Bell	Finely forged bell made from a gleaming metal.	Found in the bellvein tunnels above and below Bellhart during the Silver Bells wish.
Pale Oil	Bile gland of a rare sylphean slug. Talented pinmasters can use the glistening liquid within to improve a blade's sharpness.	See Pale Oil: How to Acquire.
Plasmium	Liquid lifeseed, possessed of remarkable regenerative qualities. A substance foreign to Pharloom, introduced by the Alchemist Zylotol.	Collected using the Needle Phial during the Alchemist's Assistant wish.
Plasmified Blood	Blood of a creature merged full with liquid lifeseed. Possesses powerful regenerative qualities.	Collected using the Needle Phial during the Advanced Alchemy wish.
Ragpelt	Tattered pelt taken from the body of a Crawbug. Fragile and drab, it is considered to have few practical uses.	Dropped by Craws during the Crawbug Clearing wish.
Pollip Heart	Core of a flower formed around the body of a consumed Wood Wasp. Secretes a sticky sap that the wasps subsist on.	See Pollip Heart: How to Acquire.
Roach Guts	Fresh innards of a Muckroach, tough and slimy with a rank odour. Unpalatable to most.	Dropped by Muckroaches during the Roach Guts wish.
Courier's Swag	Heavy cloth sack containing tools, trinkets and medical aids.	Given by Tipp & Pill during Delivery Wishes.
Queen's Egg	Fragile egg containing a young Silkeater Queen. Though the Queen cannot gather Silk itself, with time and care it could be raised to breed more Silkeaters.	Given by Tipp & Pill during the Queen's Egg wish. Unobtainable in Steel Soul Mode.
Liquid Lacquer	Pale glaze used in the preparation and protection of bone masks.	Given by Tipp & Pill during the Liquid Lacquer wish.
Courier's Rasher	Fatty meat of indeterminate origin. Once prepared it will quickly spoil if not stored properly.	Given by Tipp & Pill during the Great Taste of Pharloom wish.
Vintage Nectar	High quality nectar of a long-lived aphid, kept in storage over many lifetimes to allow a complex maturation.	Sold by Creige during the Great Taste of Pharloom wish.
Pickled Muckmaggot	Pungent delicacy preserved in roach brine. The most famous creation of the disgraced chef Lugoli.	Dropped by Disgraced Chef Lugoli when they are defeated.
Crustnut	Tough, furred seed from the centre of a corpora cluster. Stale to taste, but strong once ground as seasoning.	Found in Sands of Karak.
Steel Spines	Hard forged spines, intended for use in heavy machinery and able to pierce through even the toughest shell.	Sold by Crull and Benjin during the Infestation Operation wish.
Choir Cloak	Garment gifted to pilgrims on admittance to the Citadel. Its thick weave offers additional protection against wind and cold.	Obtained from the corpses of slain choirbugs during the Cloaks of the Choir wish.
Magnetite	Brittle levitating rock, found throughout the fringes of Pharloom.	Found near the Brightvein.
Broodmother's Eye	Gelatinous organ collected from the defeated Broodmother.	Dropped after slaying the Broodmother, which only appears in the Slab during The Wailing Mother wish.
Seared Organ	Meat harvested from a defeated creature. It has been seared in a way that noticeably affects the flavour.	See Seared Organ: How to Acquire.
Shredded Organ	Meat harvested from a defeated creature. It has been diced into fine chunks.	See Shredded Organ: How to Acquire.
Skewered Organ	Meat harvested from a defeated creature. It has been cleanly speared through, but is otherwise intact.	See Skewered Organ: How to Acquire.
Voltridian	Hard, charged stone that can catch, store and discharge electricity.	Found in the eastern part of Voltnest.
Hermit's Soul	Heavy bell filled with the shimmering soul of the Bell Hermit.	Given by Bell Hermit during the Silk and Soul wish.
Maiden's Soul	Vial gifted by the Chapel Maid, filled full with swirling soul.	Given by Chapel Maid during the Silk and Soul wish.
Seeker's Soul	Cracked shell containing soul drawn from a long deceased bug.	Found at Bilehaven in Bilewater after defeating Groal the Great.
Encrusted Heart	Enlivened heart of Crust King Khann. It beats deep and slow.	Acquired after defeating Crust King Khann in the Coral Tower.
Pollen Heart	Enlivened heart of Nyleth. It beats faint and fast.	Acquired after defeating Nyleth in Grand Gate.
Hunter's Heart	Enlivened heart of Skarrsinger Karmelita. Its beat is steady and strong.	Acquired after defeating Skarrsinger Karmelita in Far Fields.
Conjoined Heart	Enlivened heart of the Green Prince. Its beat is sharp and clear.	Acquired after defeating the Clover Dancers in Lost Verdania.

Relics

Appearance	Description	Location
Bone Scroll	Crumpled parchment containing the prayer of a Burning Bug. "Hail to your heat! O glorious flame. You who builds and breaks us. Sear our shells. Char them black. That we may rise to join you, wreathed in bright and blazing joy."	In the Wisp Thicket, room east of the bench
	Singed parchment containing a pilgrim's scrawl. "My dear companions, all are gone now, devoured, scorched, fallen to exhaustion, or worse, seduced by the Haunting."	In the Far Fields, east of Seamstress's home, up a tall wind current.
	Faded parchment containing the last words of a lost pilgrim. "-ter I die here in the damp dark than join those poor sods, trapped to stumble, aimless and empty, until their limbs fall to dust."	In Greymoor, east of Halfway Home.
	Filthy rag, marked with the scrawl of an Underworker. "So much suffering. Are we truly chosen, or have we sinned unknowing, and now are punished for it?"	In the western Underworks.
Weaver Effigy	Carving of Camora, Weaver of healing. A prayer is etched upon it. "Weaver, heal my sons, their fearful hearts, their limbs that shake at the climb to come. We pray, gift but a glimmer of your strength, that when we stand before your divinity, you see bugs shed free of fear."	West of Mosshome, below the entrance to the Wormways.
	Carving of Keelal, Weaver of the path. A prayer is etched upon it. "Blessed Weaver, lady of grace, you who see our sin, our frail shells, our voices weak, and still offer your protection. How great your mind to care so much for ones so lowly."	East of Chapel of the Witch. Accessible after completing the Rite of Rebirth wish.
	Carving of Atla, Weaver of time. A prayer is etched upon it. "By grace of your example, and our history held full in mind, our song is yours, as your name is sacred. Weaver Atla, may you be praised eternal."	In a room below First Sinner's cell (requires Key of Apostate).
Choral Commandment	Decree of the Citadel, dirty and worn. "Full Chamber to the kingdom of the White Wyrm. Claim the Weaver, in half part. Last of their line. Sensed strong with Silk. Resistance anticipated. Quell with rune cage."	Western edge of Mosshome, behind a breakable wall.
	Surgeon's orders. "Devout has succumbed during Silk suture. Refuses to revive. Sin committed. Permit no rites. Husk marked for cremation. Retrieve dregs."	Western Whiteward.
	Last edict of the Conductors. "And lo, is eternity sustained. By Architect's claw, we welcome that final form, of dial and rotor, and soul gladly given. The perfect, unfaltering voice."	Bought from Jubilana for  180.
	Tattered decree of the Citadel. "Bug of voice grown hoarse or shell fallen frail, you have been selected for duty most sacred. Become our light, our guide in darkness, that others worthy may climb to join the holy song."	Eastern Whiteward (Requires Silk Soar or a precise jump with Faydown Cloak).
Rune Harp	Words of a Weaver from the nest beneath Bone Bottom. "Hide her deep, the despised child, our shame shown in shell of iron. She is a wish cast vain, divinity mimicked in form too frail."	Weavenest Atla (requires Needolin and Cling Grip).
	Plea of a Weaver from the furthest edge of Pharloom. "Flee, sisters. Flee until your strength exhausts, so far you may escape at last her silken sight. To start anew, to sustain, free of web and service eternal."	Weavenest Cindril, lower level (requires Needolin, Silkspeed Anklets, and Flea Brew).
	Last words of the Weavers. "Sisters, spiders, the burden is passed. These simple bugs shall bear it full. Never to cease. Never to silence. We shall die, and wait, and pray, that one may come of silken strength enough to weave us free."	High Halls, in the room left of The Forum, where Conductor Ballador can be found in Act 2 (Exclusive to Act 3).
Arcane Egg	An artefact almost impossibly old, marked inside with many fine etchings. Most are indecipherable. "...No will... No self... Shade..."	Upper part of The Abyss.

Cylinders

Appearance	Description	Location
Psalm Cylinder	Voices of the Choir, raised in sacred song.	Found in the Whispering Vaults, in the room with Vaultkeeper Cardinius.
	Last surgery of Conductor Mizello, performed in Whiteward's operating theatre.	Found in the Underworks, below the room where The Unravelled is fought.
	Guide track for the Choir, with a theme of ascendence.	Found in the High Halls, to the northwest of the Ventrica in a maze of pipes.
	Guide track for the Choir, with a theme of salvation.	Bought from Grindle for  240.
	Sermon of service, delivered by an ordained Vaultkeeper to acolytes in training.	Found in far east Whispering Vaults after ascending a large wind shaft and looping around the west
Sacred Cylinder	Sacred melody of the Vaultkeepers, coveted and claimed by the pontiff below the Whispering Vaults.	Found in lower Whispering Vaults accessible via the Underworks after beating Trobbio.

Mementos

Appearance	Description	Location
Sprintmaster Memento	Gilded trophy awarded by Sprintmaster Swift to the fastest bug in Pharloom.	Awarded by Sprintmaster Swift in Far Fields beating him four times in his races.
Guardian's Memento	Aged medallion of the wanderer Seth. A gift given in respect of great skill.	Awarded by Seth after beating all of his high scores in the Festival of the Flea games at Fleatopia.
Hero's Memento	Heirloom of a village lost to Pharloom's Haunting.	Dropped by Lost Garmond after defeating him in the Blasted Steps.
Hunter's Memento	Seal symbol given in recognition of a true Hunter, stamped in sticky goo.	Awarded by Nuu in Halfway Home after fully completing the Hunter's Journal.
Grey Memento	Engraved cruststone, worn by sand and blanched by time. ..Watch...Remember...Till time... Life anew...	Dropped by Watcher at the Edge in Sands of Karak after defeating them in combat.
Surface Memento	Worn ornament of the Nameless Town high above Pharloom.	Obtained by playing the Needolin at a corpse to the far east of the Nameless Town.
Craw Memento	Iron emblem of the Court of Craws, absolving the bearer of all crimes past and future.	Dropped by Crawfather after defeating him in the Court of Craws.
Encrusted Heart	Enlivened heart of Crust King Khann. It beats deep and slow.	Acquired after defeating Crust King Khann in the Coral Tower. Becomes a memento if collected after obtaining the Everbloom using the other three hearts.
Pollen Heart	Enlivened heart of Nyleth. It beats faint and fast.	Acquired after defeating Nyleth in Grand Gate. Becomes a memento if collected after obtaining the Everbloom using the other three hearts.
Hunter's Heart	Enlivened heart of Skarrsinger Karmelita. Its beat is steady and strong.	Acquired after defeating Skarrsinger Karmelita in Far Fields. Becomes a memento if collected after obtaining the Everbloom using the other three hearts.
Conjoined Heart	Enlivened heart of the Green Prince. Its beat is sharp and clear.	Acquired after defeating the Clover Dancers in Lost Verdania. Becomes a memento after obtaining the Everbloom, either by collecting all four hearts beforehand or by collecting it after using the other three.

Trivia

• As there are four Hearts to acquire (Encrusted Heart, Pollen Heart, Hunter's Heart and Conjoined Heart) but only three are needed to enter Red Memory, the final unused Heart is instead displayed as the last Memento.
  • If Hornet has all four Hearts before delving into the Red Memory, the Encrusted, Pollen, and Hunter's Heart take priority, leaving the Conjoined Heart to be used as a Memento.
  • If Hornet is substituting the Conjoined Heart for one of the other three to dive into Red Memory, the remaining Heart can still be collected afterwards and is used as a Memento.
• The Farsight displays empty entries for items that have not been seen.
  • The Flintgems, Crown Fragment, Pilgrim Shawls, and Roach Guts are missable items and do not create empty entries if they were not obtained.

Names in Other Languages

Language	Name	Meaning/Explanation
Brazilian Portuguese	Materium	—
French	Matérium	Materium
German	Materium	—
Italian	Materium	—
Japanese	マテリウム Materiumu?	Materium
Korean	마테리움 Materium	Materium
Russian	Материум Materium	Materium
Simplified Chinese	物质库 Wùzhì kù?	Material Library
Traditional Chinese	物質庫 Wùzhì kù?
Spanish	Materium	—
Internal name	MATERIUM