SLOVENSKO BOSANSKI/HRVATSKI/SRBSKI ENGLISH ITALIANO DEUTSCH
Poldragi Kamni Minerali v naravni obliki
Poludrago Kamenje Minerali u prirodnom obliku
Semi-precious Stones Minerals in rough form
Semipreziose Pietre Minerali in forma grezza
Edelsteine Mineralien in Rohform
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Rough AGATE BLUE (100 gr – 3000 gr)
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Agate usually forms in rounded nodules or knobs which need to be sliced open to bring out the internal pattern hidden in the stone. Most Agate is ugly in its natural state; specimens must be polished to bring out their full beauty. Much of the Agate sold to collectors has been treated, in the form of tumbled stones or polished slabs. Popular collector forms of Agate include nodules or geodes sliced in the middle into two polished cross-sections, or thin slabs from nodule or geode cross-sections.
Agate is often dyed to enhance its colors. This is especially true of Agate from Brazil. Bright neon colors such as bright blue and red are rarely natural.
Agate is named after the Achates River (now known as the Dirillo River) on the island of Sicily, Italy, whose upper waters were an ancient source of this gemstone.
Chemical Formula SiO2
Composition Silicon dioxide
Color Multicolored in banded formation. Colors include white, blue, red, green, yellow, orange, brown, pink, purple, gray, and black. Some rarer forms of Agate are iridescent.
Streak White
Hardness 7
Crystal System Hexagonal
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Rough AGATE GREEN (100 gr – 3000 gr)
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Rough AGATE TAPE (100 gr – 3000 gr)
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Rough AGATE ZEBRA (100 gr – 3000 gr)
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Rough JASPER FISH SKIN (100 gr – 3000 gr)
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Chemical Formula SiO2
Composition Silicon dioxide, usually with impurities of iron oxides or organic substances.
Color Brown, yellow, orange, red, green, or blue. May also refer to any form of opaque Chalcedony in all colors. Jasper is usually multicolored or banded.
Streak White
Hardness 6.5 – 7
Crystal System Hexagonal
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Rough JASPER GREEN (100 gr – 3000 gr)
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Rough JASPER GREEN-YELLOW STRIPES (100 gr – 3000 gr)
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Rough JASPER KAMBAMBA (100 gr – 3000 gr)
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Rough JASPER “OCEAN” (100 gr – 3000 gr)
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Rough JASPER POLYCHROME (100 gr – 3000 gr)
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Rough JASPER “PRINTED” (100 gr – 3000 gr)
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Rough JASPER RED (100 gr – 3000 gr)
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Rough JASPER YELLOW (100 gr – 3000 gr)
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Rough Quartz AMETHYST (100 gr – 3000 gr)
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Chemical Formula SiO2
Composition Silicon dioxide. Its purple coloring is usually caused by impurities of iron or manganese compounds.
Color Light to dark purple. Sometimes banded with purple and whitish lines. May also be mixed together with Citrine.
Streak White
Hardness 7
Crystal System Hexagonal
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Rough Quartz BLUE (100 gr – 3000 gr)
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Chemical Formula SiO2
Composition Silicon dioxide
Color Colorless, white, purple, pink, brown, and black. Also gray, green, orange, yellow, blue, and red. Sometimes multicolored or banded.
Streak White
Hardness 7
Crystal System Hexagonal
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Rough Quartz GREEN (100 gr – 3000 gr)
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Rough Quartz HEMATOIDE RED (100 gr – 3000 gr)
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Rough Quartz HEMATOIDE YELLOW (100 gr – 3000 gr)
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Rough Quartz LAVANDER (100 gr – 3000 gr)
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Rough Quartz PURPLE (100 gr – 3000 gr)
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Rough Quartz ROSE (PINK) (100 gr – 3000 gr)
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Rough Quartz SMOKY DARK (100 gr – 3000 gr)
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Rough Quartz SMOKY (100 gr – 3000 gr)
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Rough Quartz WHITE (100 gr – 3000 gr)
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Rough AMAZONITE (100 gr – 3000 gr)
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Chemical Formula KAlSi3O8
Color Blue, Green, Purple, Gray, Multicolored
Hardness 6 – 6.5
Crystal System Triclinic
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Rough CARNELIAN (100 gr – 3000 gr)
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Chemical Formula SiO2
Color Red, Orange
Hardness 7
Crystal System Hexagonal
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Rough FLUORITE (100 gr – 3000 gr)
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Fluorite is one of the more famous fluorescent minerals. Many specimens strongly fluoresce, in a great variation of color. In fact, the word “fluorescent” is derived from the mineral Fluorite. The name of the element fluorine is also derived from Fluorite, as Fluorite is by far the most common and well-known fluorine mineral.
Chemical Formula CaF2
Composition Calcium fluoride
Color Fluorite occurs in all colors, including colorless, white, purple, blue, red, pink, orange, yellow, brown, green, gray, and black. May also be multicolored and banded.
Streak White
Hardness 4
Crystal System Isometric
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Rough LABRADORITE (100 gr – 3000 gr)
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Labradorite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. Albite is one member, containing sodium and no calcium. The other end member, Anorthite, contains calcium and no sodium. Labradorite is an intermediary member of this series. Labradorite is considered by some authorities as a variety of Anorthite rather then a separate mineral.
Chemical Formula (Ca,Na)Al1-2Si3-2O8
Color White, gray, light blue, light green, pale orange-red, black, usually with a strong multicolored display of purple, blue, and green schillers.
Streak White
Hardness 6 – 6.5
Crystal System Triclinic
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Rough “OPAL” GREEN (100 gr – 3000 gr)
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To protect Opals from crazing, they should not be washed with chemicals or detergents and should not be subject to sudden changes in temperature or lighting.
Chemical Formula SiO2 · nH2O
Composition Hydrous silicon dioxide. The water can range from 3% to 21% of the total weight, but is usually between 6% to 10%.
Color Colorless, white, yellow, orange, red, purple, blue, green, gray, brown, and black. These are some of the base colors of Opal.
Streak White
Hardness 4.5 – 6.5
Crystal System Amorphous
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Rough RUBELLITE TOURMALINE (100 gr – 3000 gr)
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Tourmaline is both pyroelectric and piezoelectric. If a specimen is put under a pressure or temperature change, it will generate an electrical charge. When this happens, dust particles become attached to the crystal ends.
Chemical Formula – The formula for the Tourmaline group is very complex. See The chemical formula of Tourmaline for more details.
Composition See The chemical formula of Tourmaline.
Color Tourmaline is extremely varied in color. Colors include black, brown, green, red, pink, blue, and gray. White, colorless, yellow, orange, and purple colors are less common. Crystals are frequently multicolored, containing two or more distinct colors. Some specimens are pleochroic.
Streak White
Hardness 7 – 7.5
Crystal System Hexagonal
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Kamni Minerali Fosili Amoniti Fosiliziran-okamnel-les
Kamenje Minerali Fosili Amoniti Fosilizirano-okamenjeno-drvo
Stones Minerals Fossils Ammonites Petrified-wood
Pietre Minerali Fossili Ammoniti Legno-pietrificato
Steinmineralien Fossilien Ammoniten Versteinertes Holz