From YPPedia

Serandite
Raw goods
Mass: 3.4 kg	Volume: 1 L
Obtained from: Merchant Brigands, Commodities markets
Used by: Apothecaries, Iron mongers, Weaveries, Shipyards
End products: Bludgeons, Cloth, Enamel, Paint, Swords

Serandite is one of eleven minerals. It is an ingredient in swords, bludgeons, paint, enamel and cloth.

German article: Serandit

Spawn Locations

Cobalt	Hunter	Ice	Malachite	Midnight	Sage	Viridian
Last Stand Hill* Surtsey Island* Xian Rock*	Gallows Island Tumult Island	Escher Island*	Duat Island Marmara Odonata Nightshade Island* Striga Cay*	Angelfish Island Cnossos Island Emperor Island Islay of Luthien Norse Island*	Albatross Island*	Last Stand Hill* Surtsey Island Xian Rock*

*Islands without market bidding.

Use

Serandite is needed in the production of:

Apothecary products

Pink paint (1)

Pink enamel (2)

Iron monger products

Saber (3)

Stiletto (1)

Shipyard products

Cane (3)

Chain (6)

Gauntlets (6)

Skull Rings (5)

Weavery products

Magenta cloth (1) Pink cloth (1)

Rose cloth (1) Fine magenta cloth (2)

Fine pink cloth (2) Fine rose cloth (2)

Real World Counterpart

Serandite is made from the elements Sodium, Calcium, Manganese, Silicon, Hydrogen, and Oxygen, by the chemical formula Na(Mn²⁺,Ca²⁺)₂Si₃O₈(OH) This is based on the data from http://webmineral.com