Pearls

Pearls

Pearls, often used as gemstones, are the by-products of certain molluscs' protective mechanisms.

Bioloģija

Atslēgvārdi

pērle, rotaslietas, pusdārgakmens, mīdija, parazīts, Pērļu māte, pērļu zveja, dzīvnieks, moluski, Mīkla, Bioloģija

Saistītie vienumi

Freshwater pearl mussel

A species of mollusc widespread in freshwaters.

Ammonites

An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.

Calcium carbonate (CaCO₃)

Limestone is a widely and diversely used material.

Mallard

This animation demonstrates the anatomy of birds through the example of mallards.

Diamond

Crystalline allotrope of elemental carbon, the hardest known natural substance.

Indian maharaja with his wife (18th century)

Maharajas were Hindu rulers of large regions of India.

Junk

A sailing vessel with characteristic lugsails used for both military and trade purposes.

Louis XIV (the Sun King)

The French monarch got his epithet because of his opulent and extravagant lifestyle.

The Hungarian Crown Jewels

The best-known piece of the Hungarian Crown Jewels is the Holy Crown.

Traditional Arab sailboat (Sambuk)

The largest type of Arab sailboat, most commonly used as trading vessels in the Persian Gulf.

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