​

​

+

2 labels

1998 -131

131-136

​

 1998 -132

 1998 - 33

 1998 -134

Corundum  Blu Sapphire

Al₂O₃

Corundum Ruby

Al₂O₃

Lapislazuli

Lapis lazuli is an opaque rock that mainly consists of lazurite,  pyrite  and calcite

Tourmaline

(Ca,K,Na,[])(Al,Fe,Li,Mg,Mn)₃

(Al,Cr, Fe,V)₆(BO₃)₃(Si,Al,B)₆O₁₈(OH,F)₄

1998 -135

1998 -136

 1998 – 136a - Label

  1998 – 136a - Label

Spinel

general name for a group

Quartz Amethyst

SiO₂

Topaz

Al₂SiO₄(F,OH)₂

Stibnite

Antimonite

Sb₂S₃

​

​

 1998 - 136a

Agate

SiO₂

^***

1961 - 55

 45-56

Diamond

C

 **

1983 - 227 - Multi

225-228

​

 2004 – 227c 

Diamond

C

^***

1986 - 255

​254-257

1986 - 311

Diamond

C

 Corundum Sapphire

Al₂O₃

Zoisite Tanzanite

(Ca₂Al₃(SiO₄)(Si₂O₇)

O(OH)

Corundum Ruby

Al₂O₃

Corundum Ruby

Al₂O₃

2002 2218

2213-2218

Gold - Diamond

Au - C

 2004 – 2329 - Multi

2004 – 2329a

Mining in Tanzania

Gemstones

2004 – 2329 - BF

2004 – 2329a

Mining in Tanzania

Unprocessed gemstones

1996 - 653D - Multi

​

​

Various minerals

1996 - 653s

1996 – 653t

1996 – 653u

1996 – 653v

Kyanite

Al₂SiO₅

Olivine

(Mg,Fe)₂SiO₄

Sphene

CaTiSiO₅

Hemimorphite

Zn₄Si₂O₇(OH)₂•H₂O

1996 - 717 - BF  

1996 - 717 

Zoisite v. Tanzanite 

Ca₂Al₃(SiO₄)₃(OH)

  idem

1997 - 717a - BF

1997 - 717

Diamond

C

Diamond

C

1998 - 788B - Multi

Various Minerals

 +

Gold - Au

Various Minerals

+

Magnetite

1988 - 788Aa

1988 – 788Ab

1988 – 788Ac

1988 – 788Ad

Opal

SiO₂•nH₂O

Kyanite

Al₂SiO₅

Chalcopyrite

CuFeS₂

Apatite

Ca₅(PO₄)₃[F, OH, Cl]

1988 – 788Ae

1988 – 788Af

Celestine

CaSO₄

Scorodite

Fe³⁺AsO₄•2(H₂O)

1988 – 788Ba

1988 – 788Bb

1988 – 788Bc

1988 – 788Bd

Agate

SiO₂

Wulfenite

PbMoO₄

Baryte

BaSO₄

Tanzanite

Ca₂Al₃(SiO₄)(Si₂O₇)

O(OH)

1988 – 788Be

1988 – 788Bf

Feldspar  Amazonite

KAlSi₃O₈

Malachite

Cu₂(CO₃)(OH)₂

1999 - 839

839 - 844

​

 1999 – 840

 1999 – 841

 1999 – 842

Wulfenite

PbMoO₄

Argentite

Ag₂S

Siderite

FeCO₃

Dolomite and Quartz

MgCa(CO₃)₂- SiO₂

1999 – 843

1999 – 844

Cu₃[OH|CO₃]₂

MgAl₂O₄ - CaCO₃

1999 - 845 - BF 

Y&T BF 94

Cassiterite

SnO₂

 Tourmaline - Copper

Cassiterite

SnO₂

2001 - 934 - Multi

2001 - 934 - Label

Various minerals

2001 – 934a

934 a-d

​

2001 – 934b

2001 – 934c

2001 – 934d

Fluorite

CaF₂

Pyrite

FeS₂

Wulfenite

PbMoO₄

Merovingian slag

2001 - 937 - Multi

2001 - 937 - Label

2001 – 936a

936 a- d

​

 2001 – 936c 

​

Magnetite

FeOFe₂O₃

Spodomene Kunzite

LiAlSi₂O₆

Aphophillite verde

Fluorite

CaF₂

2001 - 937 - Multi

2001 - 937 - Label

2001 – 937a

937 a-d

​

 2001 – 937b

2001 – 937c

2001 – 937d

Quartz

SiO₂

Epidote

Quartz Amethist

SiO₂

​

*** 

2003 – n.c.- Silver

Y&T - 1514 b

​

 2003 – n.c.- Gold

 Y&T - 1514 c

​

Bornite

Cu₅FeS₄

Bornite

Cu₅FeS₄

​

 2004 – n.c. - BF

​

 2004 – n.c.

Vanadinite - Anglesite  Rhodochrosite

Dioptase blu?? - Amethist

Quartz Amethist

SiO₂

 2004 – n.c. - BF

2004 – n.c. - BF

Vanadinite - Anglesite  Rhodochrosite

Dioptase?? - Azurite

Azurite

Cu₃(CO₃)₂(OH)₂

2012 – 1551

1551-1554

​

2012 – 1552

2012 – 153

2012 – 1554

​

Fluorite​

Pyrite

FeS₂

Malachite

​Cu₂(CO₃)(OH)₂

Vanadinite

​Pb₅(VO₄)₃Cl

**** 

2012 – n.c. - BF

Y&T - BF n.c.

​

2012 – n.c. - BF

Y&T 1597-1598

Azurite - Siderite

Silver, Uranium, Gold, Olivine

Siderite, Azurite

**** 

2012 – n.c. - BF

Y&T - BF 140

​

**** 

2012 – n.c. - BF

Y&T  BF 141

Siderite

Sphene, Dolomite, Epidote

Azurite

Fluorite, Pyrite, Epidote

Y&T - 1823-1826

​

2017 – n.c.

Y&T - 1823

​

2017 – n.c.

Y&T - 1824

2017 – n.c.

Y&T- 1825

2017 – n.c.

Y&T -1826

​

Fluorite​

Quartz

Zoisite

Halite and Sylvite

​

2017 – n.c. - BF

Y&T - BF 163

​

2017 – n.c. - BF

​

Barite, Quartz and Fluorite

​

Y&T - 2035-2038

​

​

​

2017 – n.c.

Y&T - 2035

2017 – n.c.

Y&T - 2036

2017 – n.c.

Y&T- 2037

2017 – n.c.

Y&T -2038

​

Magnetite

​

Papagoite

Beryl v. Heliodor

​

2017 – n.c. - BF

Y&T - BF 216

​

2017 – n.c. - BF

​

Topaz, Labradorite,

Cobaltocalcite, Siderite and Barite

​

1989 - 146

146-147

​

 1989 - 147

 1990 - 156

 1991 - 163

Mesotype

Group name of zeolites

Analcime

NaAlSi₂O₆·(H₂O)

Aragonite

CaCO₃

Mordenite

 (Ca,Na₂,K₂)Al₂Si₁₀O₂₄

·7(H₂O)

1993 - 183

1994 - 194

1995 - 203

1996 - 212

Garnet Almandine

Fe₃Al₂(SiO₄)₃

Cordierite

Mg₂Al₄

Olivine

(Mg,Fe)₂SiO₄

Microcline - Amazonite

KAlSi₃O₈

1997 - 222

1998 - 235

1999 - 244

2000 - 259

Quartz  Amethist

SiO₂

Quartz Rock crystal

SiO₂

Epidote

Ca₂Al₂(Fe³⁺,Al)(SiO₄)

(Si₂O₇) O(OH)

Mica

2001 - 279

2002 - 300

2003 - 315

2004 - 330

​

Magnetite

FeOFe₂O₃

​

Nepheline

(Na,K)AlSiO₄

Apatite

Ca₅(PO₄)₃[F, OH, Cl]

Calcedony

SiO₂

 2005 - 344

 2006 - 362

2007 - 375

2008 - 396

 Y&T - 499

​

​

Agate

SiO₂

​

Rutile

TiO₂

Corundum

Al₂O₃

Spinel

MgAl₂O₄

2009 - 411

 Y&T - 521

2010 -422 

 Y&T - 556 

2011 - 443a

443 a -b

2011 - 443b

Pyrite

FeS₂

Tourmaline v. Elbaite

Na(Li_1.5,Al_1.5)Al₆Si₆O₁₈(BO₃)₃(OH)₄

Zircon

ZrSiO₄

Zircon

ZrSiO₄

2012 - n.c.

Y&T - 602-603

​

2012 - n.c. 

​2013 - n.c.

 2013 - n.c.  

​

Diopside

​

Diopside

Hematite "rose"

Fe₂O₃ 

​ Hematite

Fe₂O₃ 

2014 - n.c.

Y&T - 686-687

​

2014 - n.c. 

​

2015 - nc

2015 - nc

Fluorite

CaF₂

​

Fluorite

CaF₂

​

Beryl v. emerald

Beryl various colours

 2016 - n.c.

 Y&T - 761-762

2016- n.c. 

2017 - n.c.

Y&T - 795-96

2017- n.c. 

​

​

Titanite

​

​

Titanite

​

XY(Si,Al)₂O₆

2019 - n.c. ​n.c.

 Y&T - 845-846

​

 Y&T - 884-885

​

Ilmenite

​

Ilmenite cut

(Mg,Al)₈(Al,Si)₆O₂₀

​

2020 - n-c.

 Y&T - 919

​

2020 - n-c.

2021- n-c.

2021 - n-c.

​

Amethist​

SiO₂

​

​

2022 - n-c.

 Y&T - 1003

​

2022 - n-c.

 Y&T - 1004

2023 - n-c.

 Y&T - n.c.

2023 - n-c.

 Y&T - n.c.

Mg₃(Si₂O₅)(OH)₄

​

Serpentine

Mg₃(Si₂O₅)(OH)₄

​

​​

[Na][Na₂][(Fe²⁺)₄Fe³⁺][(OH)₂|Si₈O₂₂]