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1
La Montaña - Tumbaga Ska&Reggae (Letra en la descripción)
La Montaña - Tumbaga Ska&Reggae (Letra en la descripción)
::2013/02/01::
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2
TUMBAGA FESTIVAL 2013 MONTERÍA - CÓRDOBA.
TUMBAGA FESTIVAL 2013 MONTERÍA - CÓRDOBA.
::2013/12/27::
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3
Plato Ginting - Si Boru Tumbaga ( Theme Song Opera Batak Si Boru Tumbaga )
Plato Ginting - Si Boru Tumbaga ( Theme Song Opera Batak Si Boru Tumbaga )
::2013/04/19::
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4
Lamtio Voice - Si Boru Tumbaga (Opera Batak)
Lamtio Voice - Si Boru Tumbaga (Opera Batak)
::2013/03/16::
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5
Lina Pandiangan - Si Boru Tumbaga
Lina Pandiangan - Si Boru Tumbaga
::2007/02/09::
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6
La Tumbaga - Coartada - Festival Internacional Altavoz 2012
La Tumbaga - Coartada - Festival Internacional Altavoz 2012
::2013/11/20::
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7
Jose Ocampo vs. Mike Tumbaga
Jose Ocampo vs. Mike Tumbaga
::2013/01/16::
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8
La TUMBAGA - Virus
La TUMBAGA - Virus
::2010/07/09::
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9
Andung Ni Siboru Tumbaga
Andung Ni Siboru Tumbaga
::2009/03/23::
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10
ROTUA FEBRIANI, Drama Tari dengan judul Siboru Tumbaga
ROTUA FEBRIANI, Drama Tari dengan judul Siboru Tumbaga
::2013/06/09::
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11
TUMBAGA MALLORQUINA
TUMBAGA MALLORQUINA
::2013/06/03::
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12
Tumbaga - Orlando Cachaito Lopez
Tumbaga - Orlando Cachaito Lopez
::2011/11/18::
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13
WBC Night of Champions - Ekapol Singwancha (Thai) vs. Mike Tumbaga (Phil), 28 May 2013 @HKCEC
WBC Night of Champions - Ekapol Singwancha (Thai) vs. Mike Tumbaga (Phil), 28 May 2013 @HKCEC
::2013/07/09::
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14
Boru tumbaga
Boru tumbaga
::2013/06/18::
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15
magkabilang mundo.cover by Jesther Tumbaga
magkabilang mundo.cover by Jesther Tumbaga
::2014/02/14::
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16
LA TUMBAGA ALTA VOZ 2012 -Audio en vivo-
LA TUMBAGA ALTA VOZ 2012 -Audio en vivo-
::2012/10/16::
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17
Suramerica, tumbaga fest 2013 monteria cordoba.
Suramerica, tumbaga fest 2013 monteria cordoba.
::2013/07/28::
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18
Trailer Tumbaga Festival 2103 Montería-Colombia.
Trailer Tumbaga Festival 2103 Montería-Colombia.
::2013/11/14::
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19
TUMBAGA SON. EL PONDO. Festigaitas 2012
TUMBAGA SON. EL PONDO. Festigaitas 2012
::2012/10/17::
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20
el pondo... tumbaga son, Ovejas Sucre... 2012. ♫
el pondo... tumbaga son, Ovejas Sucre... 2012. ♫
::2012/09/09::
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21
Finca Hotel Tumbaga
Finca Hotel Tumbaga
::2014/03/28::
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22
Teaser Tumbaga Festival
Teaser Tumbaga Festival
::2014/06/29::
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23
Tumbaga(2003)
Tumbaga(2003)
::2013/03/06::
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24
SONGON BORU TUMBAGA, MARYANI SIMBOLON
SONGON BORU TUMBAGA, MARYANI SIMBOLON
::2011/01/18::
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25
TUMBAGA SON. PANTALEON.. FESTIGAITAS 2012. OVEJAS SUCRE
TUMBAGA SON. PANTALEON.. FESTIGAITAS 2012. OVEJAS SUCRE
::2012/10/16::
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26
Colectro invita al Tumbaga Festival 2014, Montería
Colectro invita al Tumbaga Festival 2014, Montería
::2014/07/10::
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27
FREESTYLE HARANA TO RACHELLE ANN TUMBAGA -RUSSEL
FREESTYLE HARANA TO RACHELLE ANN TUMBAGA -RUSSEL's 21ST B DAY
::2013/04/27::
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28
La Agüita - Tumbaga Ska&Reggae
La Agüita - Tumbaga Ska&Reggae
::2013/02/01::
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29
Instrumen Batak   Malam Uning Uningan   Si Boru Tumbaga
Instrumen Batak Malam Uning Uningan Si Boru Tumbaga
::2013/11/29::
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30
Shety Simamora - Andung ni Si boru Tumbaga
Shety Simamora - Andung ni Si boru Tumbaga
::2014/04/14::
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31
La Tumbaga - Audiciones 2010 VIVA! Festival
La Tumbaga - Audiciones 2010 VIVA! Festival
::2010/05/26::
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32
Sabia Actitud - Compartiendo el Dolor @Tumbaga Fest Montería 2013
Sabia Actitud - Compartiendo el Dolor @Tumbaga Fest Montería 2013
::2013/08/01::
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33
Sabia Actitud  - Tumbaga Festival 2013 Montería
Sabia Actitud - Tumbaga Festival 2013 Montería
::2014/07/01::
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34
Edwin Tumbaga (Phi) VS Rusalee Samor (Thai) on Dec. 17th, 2010 (Round2)
Edwin Tumbaga (Phi) VS Rusalee Samor (Thai) on Dec. 17th, 2010 (Round2)
::2010/12/19::
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35
Yodchanchai Nakornloung Promotion - Edwin Tumbaga
Yodchanchai Nakornloung Promotion - Edwin Tumbaga
::2012/05/12::
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36
La Tumbaga - Ni Un Paso Atrás (Manizales Grita Rock 2010) - FactorMostaza.com
La Tumbaga - Ni Un Paso Atrás (Manizales Grita Rock 2010) - FactorMostaza.com
::2010/08/16::
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37
Long Distance Nga Ayat - Vhen Bautista Laila Tumbaga
Long Distance Nga Ayat - Vhen Bautista Laila Tumbaga
::2011/10/14::
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38
Radio Matuna - Tumbaga Festival 2013 Montería
Radio Matuna - Tumbaga Festival 2013 Montería
::2014/06/30::
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39
Siagian HPS Musik II   04  Si Boru Tumbaga
Siagian HPS Musik II 04 Si Boru Tumbaga
::2012/11/09::
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40
Tubara Reggae - Tumbaga Festival 2013 Montería
Tubara Reggae - Tumbaga Festival 2013 Montería
::2014/07/01::
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41
La Tumbaga   Quien Es Quien
La Tumbaga Quien Es Quien
::2013/11/21::
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42
Sugat Ni Ayat - Vhen Bautista & Laila Tumbaga
Sugat Ni Ayat - Vhen Bautista & Laila Tumbaga
::2008/08/11::
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43
Russel (Rachelle Ann Tumbaga)
Russel (Rachelle Ann Tumbaga)
::2012/01/12::
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44
arnel tumbaga
arnel tumbaga
::2006/11/19::
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45
Como limpiar joyas de tumbaga, oro, plata, cobre, alpaca, piuter, latón, níquel, diamantes
Como limpiar joyas de tumbaga, oro, plata, cobre, alpaca, piuter, latón, níquel, diamantes
::2012/03/06::
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46
Boru tumbaga
Boru tumbaga
::2013/06/18::
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47
Chuck Gacuma and Jonalyn Viray - Ikaw Lamang - Tumbaga & De Guzman Wedding
Chuck Gacuma and Jonalyn Viray - Ikaw Lamang - Tumbaga & De Guzman Wedding
::2013/09/29::
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48
Real Tumbaga Festival 2013
Real Tumbaga Festival 2013
::2013/08/01::
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49
Radio Matuna - Muntu [Tumbaga Fest 2013 Montería]
Radio Matuna - Muntu [Tumbaga Fest 2013 Montería]
::2013/12/17::
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50
Izoíl - Tumbaga
Izoíl - Tumbaga
::2012/12/11::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
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A pectoral of tumbaga, of the Quimbaya culture; 300–1600 AD.

Tumbaga was the name given by Spaniards to a non-specific alloy of gold and copper which they found in widespread use in pre-Columbian Mesoamerica and South America.

Composition and properties[edit]

Tumbaga is an alloy composed mostly of gold and copper. It has a significantly lower melting point than gold or copper alone. It is harder than copper, but maintains malleability after being pounded.

Tumbaga can be treated with a simple acid, like citric acid, to dissolve copper off the surface. What remains is a shiny layer of nearly pure gold on top of a harder, more durable copper-gold alloy sheet. This process is referred to as depletion gilding.

Use and function[edit]

Tumbaga was widely used by the pre-Columbian cultures of Central America to make religious objects. Like most gold alloys, tumbaga was versatile and could be cast, drawn, hammered, gilded, soldered, welded, plated, hardened, annealed, polished, engraved, embossed, and inlaid.

The proportion of gold to copper in artifacts varies widely; items have been found with as much as 97% gold while others instead contain 97% copper. Some tumbaga has also been found to be composed of metals besides gold and copper, up to 18% of the total mass of the tumbaga.

Tumbaga objects were often made using the lost wax technique and the alloy used was a mixture of copper (80%), silver (15%), and gold (5%). The indicated concentrations varied from object to object. Once the object was taken out of the cast, it was burned and as a consequence, copper from the surface of the object was oxidized to copper oxide and was then removed mechanically. The object was then placed in an oxidizing solution containing, it is believed, sodium chloride (salt), and ferric sulfate. This process removed through oxidation the silver from the surface of the object leaving only gold. When looking through a microscope, one may clearly see the empty spots from where the original elements copper and silver were removed.

The "Tumbaga" Wreck[edit]

In 1992, approximately 200 silver "tumbaga" bars were recovered in wreckage off Grand Bahama Island. They were composed of mainly silver, copper, and gold plundered by the Spaniards during the conquests of Cortés and hastily melted into bars of tumbaga for transport across the Atlantic. Because all the metals that reached Europe were melted back into their constituent metals in Spain, the bars found in the shipwreck are the only known bars of this type that remain.[1]

See also[edit]

References[edit]

  1. ^ The"Tumbaga" Saga: Treasure of the Conquistadors 1st ed. 2010

External links[edit]

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