2000  - 371

371-374

​

2000  - 372

2000  - 373

2000  - 374

Amber

Halite

NaCl

Flint

SiO₂

Sylvite

KCl

 ***

1964 – B682

B678-B683

​

 1965 - 617

 1 val

1153-1155

Diamond

C

Diamond

Diamond

2003 – 1960a

1160a - 1160e

 2003 – 1960c

 2003 – 1960d

Calcite

CaCO₃

Quartz

SiO₂

Baryte

BaSO₄

Galena

PbS

  2003 – 1960e

​

 Turquoise

CuAl₆(PO₄)₄(OH)₈.5H₂O

​

2003 – 1960a

1160a - 1160e

​

2003 – 1960b

Anverse - Philatelic Championship

Diamond

C

 2014 – n.c.

Y&T - 4403

 2014 – n.c.

Y&T - F4403-F4404 

2014 – n.c.

​

 Structure of ice

Structure

Int. Year of  Crystallography​

Structure

*** 

2018 – n.c.

 Y&T 4716-4720

​

​

Diamond - Sequence of the cut

​

2018 – n.c.

 Y&T 4716

​

2018 – n.c.

2018 – n.c.

​

Sequence of the cut - 1

​

 ​

2018 – n.c.

2018 – n.c.

 Y&T 4720

​

​

1972 – 286

286-290

​

1972 – 287

1972 – 288

1972 – 289

Engraving Jade

Engraving Jade

Engraving Jade

Engraving Jade

​

Engraving Jade

​

​

​

​

Head

​

​

1998 – 1069a

 1998 – 1069b

 1998 – 1070a

 1998 – 1070b

Uranium Minerals

Quartz

SiO₂

Aragonite

CaCO₃

Malachite

Cu₂(CO₃)(OH)₂

1998 – 1071a

1998 – 1071b

  Turquoise

CuAl₆(PO₄)₄(OH)_{8 ^.}5H₂O

 Corundum

Al₂O₃

  2003 - n.c. - see Cinderella 

 2003 - n.c. - see Cinderella

​

2017-n.c. - Multi

 Y&T - n.c.

 2017 - n.c.

 Y&T - n.c. 

2017 n.c.

 Y&T - n.c.

​

Minerals and Mineralogists

​

Opal

Crocoite

2017 - BF n.c. 

 Y&T - BF n.c.

​

​

2017 - n.c. 

​

Mineral and Mineralogists

​

Rutile

1992 – 853

Sulphur - S

Cassiterite - SnO₂ Bismutinite - Bi₂S₃

​

2012 - 1508

1508-1511

​

2012 - 1509

2012 - 1510

2012 - 1511

Andorite

PbAgSb₃S₆

Bismutinite

Bi₂S₃

Cassiterite

SnO₂

1978 - 31

29-32

​

Sorting

semi-precious stones

  **

1999 - 336

336-339

​

1999 - 337

1999 - 338

1999 - 339

Tuzlaite

NaCa[B₅O₈(OH)₂]·3H₂O

Siderite

FeCO₃

Hyalophane

(K,Ba)[Al(Si,Al)Si₂O₈]

Quartz

SiO₂

  **

2004 - 234

234-237

​

 2004 - 235

 2004 - 236

 2004 - 237

 Pyrite

FeS₂

 Antimonite

discredited name

Stibnite - Sb₂S₃

 Sphalerite 

(Zn,Fe)S

Quartz

SiO₂

**

1970 - 61

58-61

​

****

1974 - 114

114-127

 1974 - 115

Diamond - Cut

C

Quartz - Amethist

SiO₂

Agate Pink

SiO₂

1974 - 116

1974 - 117

1974 - 118

1974 - 119

Quartz

SiO₂

Copper - Nickel

Niccolite - NiAs

Moss Agate

SiO₂

Agate

SiO₂

1974 - 120

1974 - 121

1974 - 122

1974 - 123

Stilbite - Na

Na₃Ca₃[Al₈Si₂₈O₇₂]

·n(H₂O)

  Calcite

Marble Moshaneng

Diamond

C

Chrysotile

Mg₃(Si₂O₅ )(OH)₄

1974 - 124

1974 - 125

974 - 126

1974 - 127

Jasper

SiO₂

Moss Quartz

SiO₂

Quartz - Citrine

SiO₂

Chalcopyrite

CuFeS₂

****

1976 – 156

155-168

​

 1976 - 159

 1976 - 160

 1976 - 161

Quartz - Amethist

SiO₂

Agate Pink

SiO₂

Quartz

SiO₂

Copper - Nickel

Niccolite - NiAs

1974 – 162

1974 - 163

1974 - 164

1974 - 165

Moss Agate

SiO₂

Agate

SiO₂

Stilbite - Na

Na₃Ca₃[Al₈Si₂₈O₇₂]

·n(H₂O)

Diamond

C

1976 – 166

1976 - 167

1976 - 168

1976 - 169

Calcite

Marble Moshaneng

Chrysotile

Mg₃(Si₂O₅ )(OH)₄

Jasper

SiO₂

Moss Quartz

SiO₂

1976 – 170

1976 - 171

****

1984 - 341

341-344

Quartz - Citrine

SiO₂

Chalcopyrite

CuFeS₂

Diamond

C

**

2001– 710

710-713

​

 2001– 711

 2001– 712

 2001– 713

Diamond

C

Diamond

C

Diamond

C

Diamond

C

2016 – n.c. - BF

Y&T - BF 51

​

2016 – n.c.

Y&T 1744

Diamond

C

Diamond

C

1977 - 1538

1977 - 1539

Beryl - Emerald

Al₂Be₃(Si₆O₁₈)

Topaz

Al₂SiO₄(F,OH)₂

Beryl - Aquamarine

Al₂Be₃(Si₆O₁₈)

​1989 – 2198

2198-2199

​

 1989 – 2199  

​

​Tourmaline

Na(Li,Al)₃(Al)₆

[(OH)₄/(BO₃)₃/Si₆O₁₈]

Quartz - Amethist

SiO₂

​

​1998– 2660

2660-2662

​

1998– 2662  

​

Chrysoberyl

Alexandrite

BeAl₂O₄

Chrysoberyl

Cat-eye

BeAl₂O₄

​

Tourmaline - Indicolite

Na(Li,Al)₃(Al)₆

[(OH)₄/(BO₃

2000 - 2743 - Multi

Map and minerals

Brasilianite 

NaAl₃(PO₄(OH)₄

Topaz - Al₂SiO₄(F,OH)₂

Diamond - C

 2001 - 2828 a  

2001 - 2828 a                  

Topaz  - Al₂SiO₄(F,OH)₂

Garnet - X₃Y₂(SiO₄)₃

Topaz  - Al₂SiO₄(F,OH)₂

Garnet - X₃Y₂(SiO₄)₃

2009 - BF - 3067  

​

​

Map and Various gems

​

1983 - 2909

1989 – 3435

 Quartz SiO₂

Wulfenite PbMoO₄

Calcite CaCO₃

 Calcite

CaCO₃

​Ticket of Museum of Natural History - Sofia

with same logo of stamp

1995 – 3896

3806-3901

​

 1995 – 3897

 1995 – 3898

 1995 – 3899

Agate

SiO₂

Sphalerite

(Zn,Fe)S

Calcite

CaCO₃

Quartz

SiO₂

1995 – 3900

1995 – 3901

 Pyromorphite

Pb₅(PO₄)₃Cl

 Garnet - Almandine

Fe²⁺₃Al₂(SiO₄)₃

 2009 – n.c. - BF

Y & T  - BF 253 

​

2009 – n.c.

1 val 

 Quartz

SiO₂

Quartz Amethist

SiO₂

1990 – 904

Y&T 830-32

 Quartz

SiO₂

**

1978 - 268

268-271

​

1978 - 269

1978 - 270

1991 -306

1 val

​

Jade

​

 Pearls and Sapphire

 Pearl

 Ruby

​

 2012 - n.c. - Multi

Y&T - 1676-1679

​

​

2012 - n.c.

Y&T - 1676

 2012 - n.c.

 2012 - n.c.

 2012 - n.c.

Tourmaline - Liddicoatite

​

Vanadinite

​

Diamond

​

 2012 - n.c. - BF

​

​

​

2012 - n.c. - Multi

Y & T - 1714-1717

​

​

2012 - n.c.

Y&T - 1714

​

 2012 - n.c.

 2012 - n.c.

 2012 - n.c.

Orthoclase

​

Agate

​

Galena

​

 2012 - n.c. - BF

Y & T - BF 268

​

​

calcite

+

various minerals

​

2014 - n.c. - Multi

Y & T - 2082-2085

​

​

​

2014 - n.c.

Y&T - 2082-2085

​

 2014 - n.c.

 2014- n.c.

 2014 - n.c.

Agate - Carnelian

​

Malachite

​

Quartz v. Amethyst

​

 2014 - n.c. - BF

Y&T - BF 360

​

​

Variscite

+

various minerals

AlPO₄·2(H₂O)