Primer vidrio utilizado por el hombre. Su nombre deriva de
Obsidius, explorador romano que la descubrió en Ethiopía. Material de origen
volcánico. Al ocurrir una explosión volcánica parte del material fundido
contenido dentro del volcán es lanzado o fluido directamente a la atmósfera, al
tomar este contacto con el aire se produce un rápido enfriamiento de los
compuestos de sílice, produciéndose vidrio (obsidiana). Este proceso se da en
la última etapa de la erupción. Su composición principal está formada entre 70
y 80% de óxido de silicio. Como la obsidiana no es estable, con el tiempo suele
sufrir procesos de cristalización (desvitrificación) convirtiéndose en
cristales de grano fino.
Obsidian
First glass used by man. Its name derives from Obsidius, a
Roman explorer who discovered it in Ethiopia. Material of volcanic origin. When
a volcanic explosion occurs, part of the molten material contained within the
volcano is released or flowed directly into the atmosphere. Upon making this
contact with the air, a rapid cooling of the silica compounds occurs, producing
glass (obsidian). This process occurs in the last stage of the eruption. Its
main composition is formed between 70 and 80% silicon oxide. As obsidian is not
stable, over time it usually undergoes crystallization processes
(devitrification) becoming fine-grained crystals.
Museo Mineralis. Argentina. Mineralis Museum.
.jpg)
Marca: A. D. Leveridge. Hecho por Micromat. Co. Modelo:
1972. USA.
Determina peso aproximado (desplazamiento) cuando la gema
está engarzada y no es posible utilizar una balanza. También se usa para gemas
sueltas.
Método: Se toman dos o tres medidas, diámetro o longitud-
ancho y altura de la gema, con los valores obtenidos se recurre al libro anexo (diamantes)
o fórmulas especiales (gemas), sabiendo previamente la forma de la talla y el
grosor de su cintura se obtiene el peso aproximado. Museo Mineralis. Argentina.
Gem gauge.
Brand: A.D. Leveridge. Made by Micromat. Co. Model: 1972.
USA.
Determines approximate weight when the gem is mounted and a
scale cannot be used. Also used for loose gems.
Method: Two or three measurements are taken, diameter or
length-width and deep of the gem, with the values obtained, the attached book
(diamonds) or special formulas (gems) are used, previously knowing the shape of
the size and the thickness of your girle you get the approximate weight.
Mineralis Museum. Argentina.
.jpg)
Lámparas de llama
libre. Cuenco abierto.
El uso de estas
lámparas para iluminar fue muy común en la época colonial. De diseño simple,
económico y fácil de transportar. En su confección se utilizaron distintos
materiales, piedra, terracota y metal. Sus formas son muy variadas siendo la
principal el cuenco, este puede ser para apoyar sobre una superficie o para
colgar (con o sin regulador de inclinación o ajuste de altura). Para su
funcionamiento se usaron grasas animales (sebo) o aceites y un pabilo. El sebo
puede ser masivo o en forma de vela. Iluminación pobre.
Free flame lamps.
Open bowl.
The use of these
lamps to illuminate was very common in colonial times. Simple design,
economical and easy to transport. Different materials were used in its
construction, stone, terracotta and metal. Its forms are very varied, the main
one being the bowl, this can be to rest on a surface or to hang (with or
without tilt regulator or height adjustment). For its operation, animal fats (sebum)
or oils and a wick were used. Sebum can be massive or candle-shaped. Poor
lighting.
The museum at your fingertips. With our photos, comments and
ideas we try to be part of your life. Visit us. Mineralis Museum. Argentina.
The museum at your fingertips. With our photos, comments and
ideas we try to be part of your life. Visit us. Mineralis Museum. Argentina.
In the image you can see some minerals that are part of its
traveling collection. "Let's work together" program.
Fulgurita: Nombre que proviene del latín fulgur,
“relámpago”. Es sílice vitrificada. Impactita producida por rayo sobre arena,
el impacto hace que los granos de sílice se fundan y se fusionen con
posterioridad, formando una especie de raíz hueca de poco grosor y gran
ramificación. Estas estructuras se pueden hallar en desiertos y dunas
litorales. Material muy frágil.
Fulgurite: Name that comes from the Latin fulgur,
"lightning". It is vitrified silica. Impactite produced by lightning
on sand, the impact causes the silica grains to melt and subsequently fuse,
forming a kind of hollow root of little thickness and great ramification. These
structures can be found in deserts and coastal dunes. Very fragile material.
Museo Mineralis. Argentina.
In the image you can see some minerals that are part of its
traveling collection. "Let's work together" program.
Recuerdo de otros tiempos. Libro: Argentina y sus grandezas. (1910) Primera
edición. Escrito por Vicente Blasco Ibáñez en homenaje a la Argentina y al
Centenario de la Revolución de Mayo de la República Argentina.
Biografía: Vicente Blasco Ibáñez. (1867-1928). Español nacido en Valencia.
Fue escritor, conferencista, periodista, editor, novelista, político y
colonizador. Llega a la Argentina en 1909 invitado para dar una serie de
conferencias, recorriendo distintas provincias y países limítrofes. Después
regresa a Madrid para escribir Argentina y sus Grandezas. Vuelve a la Argentina
y recorre La Patagonia y el río Paraná con el objeto de formar colonias entre
1911 y 1913, entre ellas Nueva Valencia (Pcia. de Corrientes) desarrollando el
cultivo de arroz y Cervantes (Pcia. de Río Negro), ambos proyectos fracasarían.
Entre 1914 y 1923 se consagra como escritor internacional famoso con su novela
más conocida Los Cuatro Jinetes del Apocalipsis en 1916. Fallece en Menton,
Francia el 28 de Enero de 1928.
Memory of other times. Book: Argentina y sus Grandezas. (1910) First
edition. Written by Vicente Blasco Ibañez in homage to Argentina and the
Centenary of the May Revolution of the Argentine Republic.
Biography: Vicente Blasco Ibañez. (1867-1928). Spanish born in Valencia. He
was a writer, lecturer, journalist, editor, novelist, politician and colonizer.
He arrives in Argentina in 1909 invited to give a series of conferences,
visiting different provinces and neighboring countries. Then he returns to
Madrid to write Argentina y sus Grandezas. He returns to Argentina and travels
through Patagonia and the Paraná River in order to form colonies between 1911
and 1913, including Nueva Valencia (Province of Corrientes) developing rice
cultivation and Cervantes (Province of Río Negro), both projects they would
fail. Between 1914 and 1923 he established himself as a famous international
writer with his best-known novel The Four Horsemen of the Apocalypse in 1916.
He died in Menton, France on January 28, 1928.
Tektite: Impactite. Name derived
from the Greek "Tektos" which means melted. Natural gray to black
glass produced by meteorite impact. Its composition highlights the low presence
of water and molten zircon. This material can be hundreds of kilometers away
from the impact site. They are found in North America, Central Europe, West
Africa, Australia and Asia, they are given different names depending on their
location (Indochinite, Filipinite, Australite). Age: According to locality
between 0.7 and 35 million years. Ornamental use.
Desert glass:
Impactite. Light yellow natural glass found in the deserts of eastern Libya and
western Egypt (1932). Meteorite impact product (site not located). Age: 29
million years. It was used as a gem in Tutankhamun's scarab-shaped pectoral.
Ornamental use, gem. lithic tools.
Museo Mineralis. Argentina.
bis.jpg)
La Perla
Beach, Mar del Plata, Province of Buenos Aires. Argentina. Year: 1920. In it
you can see the breakwater made of loose stone and wood, the Lavorante pier
(located in Punta Iglesias) and the spa's huts. Photo taken by Eugenio Cardini
(1879-1962). Mineral Museum. Argentina.
Slag: Impactite. Glassy material produced by meteorite
impact. (Crater not found). Age: 3.3 million years. (Middle Pliocene). Also
called Chapadmalal slag (Prov. of Bs.As. Mar del Plata. Argentina). Its origin
was much discussed, at first it was given a volcanic origin, Florentino
Ameghino believed that it was a consequence of primitive man's campfires or
grassland fires, another theory says that they were the product of the chemical
reaction between minerals and groundwater and therefore last a cosmic origin by
meteorite impact (accepted current theory). Mineral Museum. Argentina.
