77

Blackish fragments

Uranium, oxygen, and minor calcium, silicon and iron

Uraninite

ICDD PDF 47-1879

Uraninite, UO₂

78

Black lustre fragments

Copper and sulphur

Chalcocite

ICDD PDF 33-0490

Chalcocite, Cu₂S

Quartz-impure chalcocite

79

Blackish fragments

Copper, antimony and sulphur

Tetrahedrite

ICDD PDF 42-0561

Tetrahedryte, Cu₁₂Sb₄S₁₃

The sample also contains pyrite and iron/copper oxides

80

Greenish black fragments with alterations

Copper, sulphur, iron and oxygen

Chalcopyrite

ICDD PDF 83-0983

Chalcopyrite, CuFeS₂

The sample shows alteration and oxidation of the surface

81

Dark, reddish fragments

Copper and oxygen

Cuprite

ICDD PDF 78-2076

Cuprite, Cu₂O

82

Reddish fragments with deep green little crystals

Sulphur, oxygen and copper

Brochantite

ICDD PDF 43-1458

Brochantite, Cu₄(SO₄)₂(OH)₆

83

Green earthy fragments with traces of cleavage

Copper, oxygen and carbon

Malachite

ICDD PDF 41-1390

Malachite, Cu₂(CO₃)(OH)₂

84

Earthy light blue fragments

Silicon, oxygen, copper and calcium as trace element

Malachite

ICDD PDF 41-1390

Malachite, Cu₂(CO₃)(OH)₂

Chrysocolla

85

Red globular fragments

Mercury and sulphur

Cinnabar

ICDD PDF 89-0438

Cinnabar, HgS

Small globular aggregates of Cinnabar in clay matrix

86

Blackish, earthy mass with no cleavage

Sulphur, antimony, copper and zinc, minor arsenic and iron

Tetrahedrite

ICDD PDF 88-0282

Tetrahedrite, Cu₁₂Sb₄S₁₃

Tetrahedryte with a little amount of S and Zn as vicariant of Sb and Cu respectively

87

Whitish-green ductile fragments

Silver and chlorine

Chlorargirite

ICDD PDF 01-1031

Chlorargirite, AgCl

88

Small silvery filamentous fragments

Silver and small amount of oxygen.

Silver

ICDD PDF 03-0921

Silver, Ag

89

Ductile steel-grey fragments

Silver and sulphur, with a small amount of oxygen

Acanthite

ICDD PDF 14-0072

Acanthite, Ag₂S

The small amount of identified oxygen is probably due to surface oxidation

90

Blackish fragments with deep red tinge

Silver, sulphur and antimony

Pyrargiryte

ICDD PDF 77-0329

Pyrargyrite, Ag₃SbS₃

91

Pitch black fragments with conchoidal fracture

Niobium, oxygen, iron, manganese and minor tantalum, uranium and titanium

Columbite

ICDD PDF 84-1020

Columbite, FeNb₂O₆

92

Blackish-brownish fragments

Oxygen and titanium

Rutile

ICDD PDF 87-0710

Rutile, TiO₂

93

Black pitchy fragments

Iron, titanium and oxygen

Ilmenite

ICDD PDF 75-1210

Ilmenite, FeTiO₃

94

Steel grey fragments with traces of cleavage

Sulphur and antimony

Stibnite

ICDD PDF 74-1046

Stibnite, Sb₂S₃

95

Steel grey fragments with good cleavage

Calcium, oxygen, tungsten and iron

Hubnerite

ICDD PDF 12-0727

Hubnerite, (Fe,Mn)WO₄

Scheelite, CaWO₄

Mn-poor Hubnerite and traces of Scheelite

96

Pale yellow fragments with good cleavage

Calcium, oxygen, tungsten

Scheelite

ICDD PDF 41-1431

Scheelite, CaWO₄

97

Silvery plates, flexible

Molybdenum and sulphur

Molybdenite

ICDD PDF 65-3656

Molybdenite, MoS₂

98

Yellow orange small crystals

Lead, molybdenum and oxygen

Wulfenite

ICDD PDF 74-1075

Wulfenite, PbMoO₄