shuangfengite
A trigonal-hexagonal scalenohedral black mineral containing iridium and tellurium.

shubnikovite
An orthorhombic light blue mineral containing arsenic, calcium, chlorine, copper, hydrogen, and oxygen.

shuiskite
A monoclinic-prismatic dark brown mineral containing aluminum, calcium, chromium, hydrogen, iron, magnesium, oxygen, and silicon.

shungite
A black, lustrous, non-crystalline mineraloid consisting mostly of carbon, used as a pigment in art and an antibacterial water treatment.

shungites
plural of shungite

sibirskite
A monoclinic-prismatic mineral containing boron, calcium, hydrogen, and oxygen.

sicherite
An orthorhombic-dipyramidal dark gray mineral containing antimony, arsenic, silver, sulfur, and thallium.

sicklerite
An orthorhombic-dipyramidal mineral containing iron, lithium, manganese, oxygen, and phosphorus.

sideburden
The rock and subsoil that lies next to a mineral deposit such as a coal seam.

sideburdens
plural of sideburden

siderazot
Alternative form of siderazote.

siderazote
A rare iron-nitrogen mineral, Fe₅N₂, associated with lava.

siderite
a widespread brown mineral, FeCO₃, having the structure of calcite.
an iron meteorite
An indigo-blue variety of quartz.
magnetic iron ore; lodestone

siderites
plural of siderite

sideroborine
a synonym of lagonite

sideroborines
plural of sideroborine

siderolite
An iron meteorite; a siderite.

sidorenkite
A monoclinic-prismatic light pink mineral containing carbon, manganese, oxygen, phosphorus, and sodium.

sidpietersite
A triclinic-pinacoidal mineral containing hydrogen, lead, oxygen, and sulfur.

sidwillite
A monoclinic-prismatic mineral containing hydrogen, molybdenum, and oxygen.

siegenite
An isometric-hexoctahedral mineral containing cobalt, nickel, and sulfur.

sieleckiite
A triclinic mineral containing aluminum, copper, hydrogen, oxygen, and phosphorus.

sienite
Alternative form of syenite.

sienites
plural of sienite

sigismundite
A mineral containing barium, iron, calcium, sodium, aluminum, phosphorus, oxygen and hydrogen, first found in Italy.

sigloite
A triclinic-pinacoidal mineral containing aluminum, hydrogen, iron, oxygen, and phosphorus.

silhydrite
An orthorhombic white mineral containing hydrogen, oxygen, and silicon.

silicocarbonatite
A carbonatite that is rich in sodium.

silinaite
A monoclinic-prismatic mineral containing hydrogen, lithium, oxygen, silicon, and sodium.

silvanite
Alternative form of sylvanite.

silvialite
A tetragonal-dipyramidal mineral containing aluminum, calcium, carbon, oxygen, silicon, sodium, and sulfur.

simferite
An orthorhombic dark red mineral containing iron, lithium, magnesium, manganese, oxygen, and phosphorus.

simmonsite
A monoclinic-prismatic pale buff cream mineral containing aluminum, fluorine, lithium, and sodium.

simonellite
An orthorhombic-dipyramidal white mineral containing carbon and hydrogen.

simonite
A monoclinic-prismatic red mineral containing arsenic, mercury, sulphur, and thallium.

simonyite
Synonym of blödite.

simplotite
A monoclinic-prismatic mineral containing calcium, hydrogen, oxygen, and vanadium.

simpsonite
A trigonal-pyramidal mineral containing aluminum, hydrogen, niobium, oxygen, and tantalum.

simulants
plural of simulant

sinhalite
An orthorhombic-dipyramidal mineral containing aluminum, boron, magnesium, and oxygen.

sinkankasite
A triclinic-pinacoidal mineral containing aluminum, hydrogen, manganese, oxygen, and phosphorus.

sinnerite
A triclinic-pedial steel gray mineral containing arsenic, copper, and sulfur.

sinoite
An orthorhombic-pyramidal mineral containing nitrogen, oxygen, and silicon.

sinoper
A sinople.

sinopers
plural of sinoper

sinopite
sinopia (clay)

sinopites
plural of sinopite

sinople
A shade of red; sinoper.
Sinoper, a kind of red earth historically used as a pigment, originally imported to Greece from Sinope in Paphlagonia.
Ferruginous quartz of a blood-red or brownish red colour, sometimes with a tinge of yellow, used to make the pigment sinopia.
Vert (green).

sinoples
plural of sinople

sipylite
A niobate of erbium.

sitinakite
A tetragonal-ditetragonal dipyramidal mineral containing hydrogen, niobium, oxygen, potassium, silicon, sodium, and titanium.

skaergaardite
An isometric-hexoctahedral mineral containing copper, gold, iron, lead, palladium, platinum, tellurium, tin, and zinc.

skinnerite
A monoclinic-prismatic silver gray mineral containing antimony, copper, and sulfur.

skippenite
A trigonal-hexagonal scalenohedral steel gray mineral containing bismuth, selenium, sulfur, and tellurium.

sklodowskite
A monoclinic-prismatic mineral containing hydrogen, magnesium, oxygen, silicon, and uranium.

skolecite
Alternative form of scolecite.

skolezite
Alternative form of scolecite.

skorodite
Alternative form of scorodite.

slatestone
slate

slatestones
plural of slatestone

slavikite
A trigonal-rhombohedral yellowish green mineral containing hydrogen, iron, magnesium, oxygen, sodium, and sulfur.

slavkovite
A green triclinic mineral, found in the Czech Republic.

slawsonite
A monoclinic-prismatic mineral containing aluminum, calcium, oxygen, silicon, and strontium.

slickings
plural of slicking

slugga
A deep cavity formed by the action of subterranean streams common in some limestone districts of Ireland.

sluggas
plural of slugga

smaltine
smaltite

smaltines
plural of smaltine

smirnite
An orthorhombic-pyramidal mineral containing bismuth, oxygen, and tellurium.

smithite
A monoclinic-prismatic mineral containing arsenic, silver, and sulfur.

smithonite
Alternative form of smithsonite.

smolianinovite
An orthorhombic mineral containing aluminum, arsenic, calcium, cobalt, hydrogen, iron, magnesium, nickel, and oxygen.

smrkovecite
A particular monoclinic white or light yellow mineral.

smythite
A trigonal-hexagonal scalenohedral pinkish cream mineral containing iron, nickel, and sulfur.

soaprock
Synonym of soapstone.

soaprocks
plural of soaprock

soapstone
A soft rock, rich in talc, also containing serpentine and either magnetite, dolomite or calcite.
Synonym of saponite.

soapstones
plural of soapstone

sobolevite
A triclinic-pedial brown mineral containing calcium, fluorine, iron, magnesium, manganese, niobium, oxygen, phosphorus, silicon, sodium, and titanium.

sobolevskite
A hexagonal-dihexagonal dipyramidal steel gray mineral containing bismuth and palladium.

soddyite
An orthorhombic-dipyramidal mineral containing hydrogen, oxygen, silicon, and uranium.

sodicanthophyllite
An orthorhombic-dipyramidal mineral containing hydrogen, magnesium, oxygen, silicon, and sodium.

sodicgedrite
An orthorhombic-dipyramidal light brown mineral containing aluminum, hydrogen, magnesium, oxygen, silicon, and sodium.

sodicpedrizite
Synonym of pedrizite.

sofiite
A mineral containing zinc, selenium, oxygen and chlorine, found in Costa Rica and Russia.

sogdianite
A mineral of the osumilite group: (K,Na)₂Li₂(Li,Fe,Al)₂ZrSi₁₂O₃₀

solongoite
A monoclinic-prismatic colorless mineral containing boron, calcium, chlorine, hydrogen, and oxygen.

solvsbergite
Synonym of soda trachyte.

solvsbergites
plural of solvsbergite

sonocrystal
A piezoelectric crystal used in sonomicrometry

sonocrystals
plural of sonocrystal

sonolite
A monoclinic-prismatic mineral containing fluorine, hydrogen, manganese, oxygen, and silicon.

sonomaite
A form of pickeringite

sonoraite
A monoclinic-prismatic yellow green mineral containing hydrogen, iron, oxygen, and tellurium.

sopcheite
An orthorhombic brownish gray mineral containing palladium, silver, and tellurium.

sorbite
Pearlite.

sorbyite
A monoclinic-prismatic white mineral containing antimony, arsenic, lead, and sulfur.

sorosite
A hexagonal-dihexagonal dipyramidal pinkish tin white mineral containing antimony, copper, and tin.

sosedkoite
An orthorhombic-dipyramidal colorless mineral containing aluminum, antimony, calcium, niobium, oxygen, potassium, sodium, and tantalum.