18:00 – 01:00 Presentation of the new Croatian Natural History Museum What awaits us in 2022? → an additional 2600 m2 of space → exhibition space in the underground annex on Tuškanac → covered atrium → large exhibits, dinosaur replicas, whale skeleton, Zagreb whale skeleton, dolphin model → souvenir shop → museum catering facility → […]
The Upper Town Amadeo Palace, home of the Croatian Natural History Museum, was severely damaged in the strong earthquake that struck Zagreb yesterday. The Museum suffered major damage on the 1st and 2nd floors of the building, and the permanent exhibition known to generations of visitors was damaged, as were the exhibits from the current […]
Minerals can be described as crystallised substances, characterised by a regular internal structure consisting of regularly arranged atoms in space. Under special, favourable conditions, they can develop in the form of regular geometric bodies – polyhedra, bounded by flat faces that are the external reflection of their regular internal structure. Such formations represent one of […]
Since 1977, when the International Council of Museums (ICOM) established International Museum Day on 18 May, numerous museums around the world have opened their doors wide to visitors on that day and presented them with diverse programmes. We were looking forward to that day this year as well; however, like most Zagreb museums located in […]
🐢 World Turtle Day 🐢 #WorldTurtleDay It was established by the non-profit organisation American Tortoise Rescue (ATR) in 1990, with the aim of raising awareness of the importance of turtle protection. Turtles, Chelonia or Testudines, are the oldest living group of reptiles today. It was once believed that they were also the oldest group of […]
What are native elements and how common are they in nature? Minerals that occur as elements are called native elements and are very rare in nature. About twenty minerals are known to belong to the class of native elements, and they make up approximately 0.1% of the total mass of the Earth’s crust. The reason […]
Why do minerals have different lustres? The lustre of a mineral depends on the reflection of light rays, and it is more intense in minerals with a higher refractive index and smooth, flat crystal faces. Mineral lustre can be adamantine, metallic, vitreous, silky, pearly, greasy, resinous, waxy or earthy. What is mineral cleavage? Minerals often […]
How do we explain the colour of minerals? The colour of a mineral is, along with its shape, the first feature noticed on a mineral. It reflects the nature of the interaction between electromagnetic radiation of the visible spectrum and the electrons of the atoms, ions or molecules from which a particular mineral is built. […]
What is a mineral? A mineral is a natural formation, created as a result of natural physical and chemical processes, with a specific chemical composition and crystal structure, stable under certain conditions of temperature and pressure. What is the origin of the term mineral? The term mineral is derived from the Latin word mineralis, meaning […]
CUBIC CRYSTAL SYSTEM a1=a2=a3 α1=α2=α3=90° It is also called the isometric crystal system. It is the most complex in terms of symmetry, but has the simplest coordinate system – three equal crystallographic axes perpendicular to one another. CRYSTAL FORMS: HALITE, NaCl – crystallises in the form of a hexahedron, a cube. It is usually colourless […]