1960 – C361

C360 - C364

​

1997 - 1441

1441-1445

 1997 - 1442

Pyrite, Chalcopyrite

Quartz

SiO₂

Chalcopyrite

CuFeS₂

1997 - 1443

1997 - 1444

1997 - 1445

Gold

Au

Silicified wood

Pyrite

FeS₂

1977 – 809

806-809 

​

 Mineral Structure

Halite

1982 - Cind

​

Various ninerals

I Exposition Filatelica energetico - minera

Madrid

1982 - Cind

​

Various ninerals

I Exposition Filatelica energetico - minera

Madrid

1994 – 2763a

2763 a-d

​

1994 – 2763b

 1994 – 2763c 

 1994 – 2763d 

Cinnabar

HgS

Sphalerite

(Zn,Fe)S

Pyrite

FeS₂

Galena

PbS

1995 – 2805a

2805 a-c

​

1995 – 2805c

1996 - 2843

2843-2844

​

Aragonite

CaCO₃

Dolomite

MgCa(CO₃)₂

Fluorite

CaF₂

​

​

2014 - n.c. - Multi

Y&T - 4559-4566

​

2014 - n.c. - Multi

Y&T - 4564

​

Collectibles Minerals

​

SiO₂ 

2020 - n.c.

Y&T - 5149

​

​

Jet

Mineraloid

​

2022 - n.c.

Y&T - n.c.

​

​

Pyrite

​

2003 – 1647

1647-1650

​

 2003 – 1648

2003 – 1649

 2003 – 1650

White Opal

SiO₂·nH₂O

Brown Precious Opal

SiO₂·nH₂O

Fire Opal

SiO₂·nH₂O

Yellow Precious Opal

SiO₂·nH₂O

2007 – 1715

1715 - 1718

 2007 – 1716

 2007 – 1717

 2007 – 1718 

Gypsum

CaSO₄·2H₂O

Quartz

SiO₂

Rock

Ambo Sandstone 

​

Feldspar