Occurences Of Amber

by Pia Gujare

baltic-amber-stone

The principal source of amber is in the Baltic Sea along the shores of Lithuania near Konigsberg. There are two sources of amber in the district : the sea amber, which has been washed up on the shore by wave action; and the pit amber obtained by open-pit mining for the amber drops (block amber) […]

amber-formation

Amber is of vegetable origin. consisting of more or less considerably altered fossilised resin of trees long since extinct, it is not a mineral. Amber is a fossilised tree resin, the parent tree being a species of pines (Pinus Succinifera). The trees grew together with palm trees. Camphor, laurels bay trees, oaks and yews in […]

Inclusions in Amber

amber-inclusions

Organic-flora and fauna of prehistoric times-especially insects inorganic – minerals, liquids and gases. In 1835 Christian Aycke put forward an unusual sug­gestion regarding amber trees, “Pines succiniferce.” He was of the opinion that the trees must have been in a deceased condition to exude the resin in very excessive quantities. At times, whole portions of […]

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Amber Fossilization

amber-fossilization

Amber is the fossilized resin from ancient forests. Amber is not produced from tree sap, but rather from plant resin. Sap is the fluid that circulates through a plant’s vascular system, while resin is the semi-solid amorphous organic substance secreted in pockets and canals through epithelial cells of the plant. This aromatic resin can drip […]

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Properties of Amber

amber-colours

Lustre Amber has resinous lustre. Some softer Dominican amber  is waxy. On exposure to air amber alters due to oxidation, Initially pale osseous amber acquires a thin clear layer like porcelain. Amber generally shows deterioration on surface to such an extent that the rusty-red crust crumbles away exposing a new surface which will undergo the […]

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Information on Amber

amber-stone

Million years ago barks of trees in the forests of some parts of the world began to seep globs of sticky resin. This aromatic resin oozed down the sides of trees, as well as filling internal fissures, trapping debris, such as seeds, leaves, feathers and insects. As geologic time progressed the forests were buried and […]

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Diamond gemstone

diamond-gemstone

Chemical Composition : Carbon C Crystal system: Isotropic or Cubic System Habit : The octahedron and the more complex trisoctahedron and hexoctahedron (form in which the normal octahedral face is replaced by three faces and six triangular faces respectively), rhombic dodecahedron may also occur. Twinned octahedra, known as macles, are common. Whereas the tetrahedron (a […]

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Garnet gemstones

garnet-group-of-gemstones

This is an isomorphous group of minerals which include several species used in jewellery, the most important of which are grossular (tsavorite), grossularite (hessonite), pyrope, almandine, spessartite and andradite with its sub-variety demantoid. GENERAL PROPERTIES OF THE GROUP Chemical Composition : All consists of a double silicate and calcium or magnesium or manganese, aluminium or […]

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Fluorspar

fluorspar-gemstone

Chemical composition: Calcium Fluoride Crystal characteristics: Cubic system. Usually occurs in cubes. Colour: Violet blue, purple, green yellow, pink, brown, blue, etc. Rarely colourless. Massive purple and whitish banded variety known as “Blue John”. Often parti coloured fluorspar is common. Physical properties: Hardness – 4, too soft to retain polish. S.G. – 3.18, R.I. – […]

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Jade gemstone

jade-gemstone

Jade is known as a mineral found out by the Chinese around 1000 BC and prized it above all other gemstones. As a whole jade does not signify one mineral but has two different mineral as variety which does not have any relation in the chemical nature of the gemstones except in appearance. 1. Nephrite, […]

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Lapis lazuli gemstone

lapis-lazuli-gemstone

This stone is characterised by its beautiful colour, which in best specimens is a uniform dark blue of great intensity. Paler tints are common and stones are often mottled. Specimens usually contain brassy spangles of iron pyrites. Characteristics: It is really a rock; a mixture of different minerals (a) hauynite, (b) calcite, (c) sodalite; iron […]

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Opal gemstone

opal-group-of-gemstones

Chemical composition: Hydrous silica di-oxide. Silica with a variable percentage of water (6% to 10%), impurities consisting of the oxides of iron, aluminium, calcium and magnesium are often present. Characteristics: Non-crystalline, amorphous. A solid silica “gel”. Varieties: (a) White opal, (b) black opal, both with play of colours (c) Fire opal, red to orange or […]

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