Poland has a rich selection of Gold

Gold

Gold is a chemical element with the symbol Au and an atomic number of 79. Gold is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a...

 and 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...

 commemorative coins. In the year 2004 coins were launched in the series: "Animals of the World", "Polish Kings and Princes", "Polish Travelers and Explorer", "The Polish Calendar of Traditional Customs and Rituals" and "Polish Painters of the Turn of 19th and 20th Centuries" and various occasional coins.

	Animals of the World: Porpoise Porpoise Porpoises are small cetaceans of the family Phocoenidae; they are related to whales and dolphins. They are distinct from dolphins, although the word "porpoise" has been used to refer to any small dolphin, especially by sailors and fishermen...  - Phocoena phocoena
	Obverse designer: Ewa Tyc-Karpinska Reverse designer: Urszula Walerzak		Mint: Mennica Polska S.A. Polish Mint The Polish Mint is a private company which is the only body permitted to manufacture coins and banknotes in Poland. It is located in Warsaw...
	Value: zl 20	Alloy: Ag 925/1000 (Silver)	Quantity: 56,000 pcs	Quality: Proof
	Issued: 28 January 2004	Diameter: 38.61 mm (1.52 in)	Weight: 28.28 g (0.997547648332566 oz; 0.909223107114359 ozt)	Market value:
Obverse: Image of the Eagle, established as the state emblem of the Republic of Poland; the notation of the year of issue: 2004 under the Eagle, an inscription: ZŁ 20 ZŁ below. Images of the national flag of Poland on both sides of the Eagle's talons, and circumscription: RZECZPOSPOLITA POLSKA above. The Mint mark: m/w under the Eagle's left talon. Reverse: Image of two porpoises, with a circumscription: MORŚWIN (porpoise), above. The inscription: Phocoena phocoena, below, against a background of part of the ornamental map of Poland.