Stützite or stuetzite is a silver

Silver

Silver is a metallic chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal...

 telluride mineral

Telluride mineral

A telluride mineral is a mineral that has the telluride anion as a main component.Tellurides are similar to sulfides and are grouped with them in both the Dana and Strunz mineral classification systems.Examples include:* calaverite* hessite* rickardite...

 with formula: Ag_5−xTe₃ (with x = 0.24 to 0.36) or Ag₇Te₄.

It was first described in 1951 from a museum specimen from Sacarimb

Săcărâmb mine

The Săcărâmb mine is a large open pit mine in the west of Romania in Hunedoara County, 30 km north of Deva and 400 km north of the capital, Bucharest. Săcărâmb represents a large gold deposit with estimated reserves of 0.53 million oz of gold...

, Romania

Romania

Romania is a country located at the crossroads of Central and Southeastern Europe, on the Lower Danube, within and outside the Carpathian arch, bordering on the Black Sea...

. It was named for Austrian

Austrians

Austrians are a nation and ethnic group, consisting of the population of the Republic of Austria and its historical predecessor states who share a common Austrian culture and Austrian descent....

 mineralogist Xavier Stütz (1747–1806).

It occurs with other sulfide

Sulfide mineral

The sulfide minerals are a class of minerals containing sulfide as the major anion. Some sulfide minerals are economically important as metal ores. The sulfide class also includes the selenides, the tellurides, the arsenides, the antimonides, the bismuthinides, the sulfarsenides and the sulfosalts...

 and telluride minerals in hydrothermal ore

Ore

An ore is a type of rock that contains minerals with important elements including metals. The ores are extracted through mining; these are then refined to extract the valuable element....

 occurrences. Associated minerals include sylvanite

Sylvanite

Sylvanite or silver gold telluride, Te2, is the most common telluride of gold.-Properties:The gold:silver ratio varies from 3:1 to 1:1. It is a metallic mineral with a color that ranges from a steely gray to almost white. It is closely related to calaverite, which is more purely gold telluride with...

, hessite

Hessite

Hessite is a mineral form of disilver telluride . It is a soft, dark grey telluride mineral which forms monoclinic crystals.It is named after Germain Henri Hess ....

, altaite

Altaite

Altaite, or lead telluride, is a yellowish white mineral with an isometric crystal structure. Altaite is in the galena group of minerals as it shares many of properties of galena. Altaite has an unusually high density for a light-colored mineral...

, petzite

Petzite

The mineral petzite, Ag3AuTe2, is a soft, steel-gray telluride mineral generally deposited by hydrothermal activity. It forms isometric crystals, and is usually associated with rare tellurium and gold minerals, often with silver, mercury, and copper....

, empressite

Empressite

Empressite is a mineral form of silver telluride, AgTe.It is a rare, grey, orthorhombic mineral with which can form compact masses, rarely as bipyrimidal crystals....

, native tellurium, native gold, galena

Galena

Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral.Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms...

, sphalerite

Sphalerite

Sphalerite is a mineral that is the chief ore of zinc. It consists largely of zinc sulfide in crystalline form but almost always contains variable iron. When iron content is high it is an opaque black variety, marmatite. It is usually found in association with galena, pyrite, and other sulfides...

, colusite, tennantite

Tennantite

Tennantite is a copper arsenic sulfosalt mineral. Its chemical formula is Cu12As4S13. It is grey-black, steel-gray, iron-gray or black in color. A closely related mineral, tetrahedrite has antimony substituting for arsenic and the two form a solid solution series. The two have very similar...

 and pyrite

Pyrite

The mineral pyrite, or iron pyrite, is an iron sulfide with the formula FeS2. This mineral's metallic luster and pale-to-normal, brass-yellow hue have earned it the nickname fool's gold because of its resemblance to gold...

.