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| Mass decorated
glass |
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Technique whereby molten glass is blown
into a mould carved with relieves, then blown a second
time to attenuate those relieves so that the motif will
appear shadow like. |
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| Metal |
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Simple substance, of a particular shine,
high specific weight, good heat and electricity conductor;
in general, ductile and malleable.
Chem.: Physically, the main characteristic of metals is
their metallic shine, a group of mechanical qualities
such as hardness, toughness, ductility and malleability.
Classification of metals according to Thénard y
Regnault: lithium, soda, potassium, rubidium, caesium
(alkaline metals), magnesium, manganese, aluminum, beryllium,
iron, cobalt, chrome, zinc, cadmium, tin, antimonious,
wolfram, lead, copper, bismuth, mercury, silver, gold,
platinum.
It is also possible to obtain alloys among these metals
which result in various products suitable for diverse
uses. |
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| Milk and Water
Glass |
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Opaque, white glass, couloured with ashes
from calcinated bones or with tin-oxide or eventually
with antimony. Name given to filigree when worked in the
glass blowing technique. |
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| Millefiori
Glass |
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A style of decorating glass with slices
of opaque coloured canes embedded in a colourless molten
glass mass. |
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| Mineral |
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Natural inorganic solid matter with a
definite, orderly atomic structure.
It may or may not form crystals of different size, ranging
from invisible to the human eye to measuring even more
than a meter in width in diameter. Mineral species are,
as a rule, of definite chemical composition and with a
determined crystalline structure that sometimes occur
in geometric like shapes. Minerals must fulfil three requirements:
material unit, natural origin and belong to the solid
layer of earth's crust.
Mineral matter is formed by the systematic arrangement
of the constituent particles, atoms, ions or molecules,
which originate a regularly homogenous crystalline matter
that, if occurring in a polyhedron shape, forms a crystal.
In general, any naturally occurring chemical element or
compound, but in mineralogy and geology, chemical elements
and compounds that have been formed through inorganic
processes. More than 3000 mineral species are known, most
of which are characterized by definite chemical composition,
crystalline structure, and physical properties.
They are classified primarily by chemical composition,
crystal class, hardness, and appearance (color, luster,
and opacity). Mineral species are, as a rule, limited
to solid substances, the only liquids being metallic mercury
and water. All the rocks forming the earth's crust consist
of minerals.
Metalliferous minerals of economic value, which are mined
for their metals, are known as ores.
Homogeneous portion of matter that has a definite, orderly
atomic structure, and an outward form bounded by smooth,
plane surfaces, symmetrically arranged. Crystals are produced
whenever a solid is formed gradually from a fluid, whether
the formation results from the freezing of a liquid, the
deposition of dissolved matter, or the direct condensation
of a gas into solid form. The angles between corresponding
faces of any two crystals of the same substance, regardless
of size or superficial difference of form, are always
identical |
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| Mineral |
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Produced by rolling the hot glass globe
over a marble or iron plate covered with small pieces
of coloured glass. These pieces adhere to the surface
of the globe resulting in a geometrical design or scenes
with characters. |
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| Mosaic glass |
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(Produced by rolling the hot glass globe
over a marble or iron plate covered with small pieces
of coloured glass. These pieces adhere to the surface
of the globe resulting in a geometrical design or scenes
with characters. |
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