Gemmology
A detailed gemmology revision course designed for those wishing to learn about jewellery and pass their exams
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In Inglés
In Inglés
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Gemmology - Marcador
Gemmology - Detalles
Niveles:
Preguntas:
465 preguntas
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| What type of lustre is bright and glossy, often seen in coloured, transparent gemstones? | Sub-Adamantine |
| What type of gemstones allow no light to pass through, and objects cannot be seen through them? | Opaque |
| What type of lustre is seen in polished gemstones such as haematite, as well as polished metals? | Metallic |
| Which term refers to the quality and quantity of light reflected from the surface of a gemstone? | Lustre |
| When looking at gemstones, which two main features should be taken into consideration? | External and Internal |
| What is the name for these internal gemstone features that can be either solid, liquid or gas? | Inclusions |
| What is the name for this type of inclusion? | Three-Phase |
| What is this kind of inclusion, also known as rutile? | Monophase solid |
| How should a stone and a loupe be held to see the most detail? | A fixed distance from eachother |
| What is an important factor when using a 10x loupe? | Good lighting |
| What type of microscope allows you to use both eyes? | Stereo Binocular |
| What type of illumination is this? | Bright-field |
| What is this type of illumination? | Dark-field |
| What is the name of the compound comprising of one or more chemical elements combined with oxygen? | Oxides |
| What is the name for a compound made of up of one or more elements combined with silicon-oxygen? | Silicates |
| What is the name for a material that is made from two or more chemically bonded elements? | Chemical compound |
| What is the name for inorganic crystalline materials that are formed by geological processes? | Minerals |
| What two components form the nucleus in an atom? | Protons and Neutrons |
| What two components are an atom comprised of? | Nucleus and electrons |
| What is the name of the process of growth whereby the bonding of atoms forms a crystal structure? | Crystallisation |
| What is the name for a material that is made up from one or more pieces or grains of crystal solid? | Crystalline |
| What is the name for a material where the individual crystalline pieces can only be seen under a microscope? | Microcrystalline |
| What is the name of the surface markings seen in this picture? | Lamellar Twining |
| What are the features seen here? | Pinacoid |