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Monte Suímo Mine, Belas, Sintra, Lisbon, Portugali
Regional Level Types
Monte Suímo MineMine
Belas- not defined -
Sintra- not defined -

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Name(s) in local language(s):Mina de Monte Suímo, Belas, Sintra, Distrito de Lisboa, Portugal
Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 38° North , 9° West (est.)
Margin of Error:~14km
Locality type:Mine
Köppen climate type:Csa : Hot-summer Mediterranean climate

Gemstone garnet mine.

Monte Suímo is a small hill about 290 meters high in the Carregueira area.
The mining area is known for its four ancient trenches in a basalt vein oriented N-NW S-SW with an estimated length between 700/800 m (the main trenche measures 120 m lenght, 54 m width, 27 m depth/height [Paul Choffat, Academia das Ciências de Lisboa, Actas das Assembleias Gerais, volume IV (1913/1915), Lisboa, Imprensa Nacional, 1918, pag. 152-156].
There are records that gem quality pyropes (semi-precious stones) were explored in this locality since, at least, the Roman times as described by Plinio-o-Velho.
The remains of these mining operations were taken by the vegetation and only in the surrounding paths of Monte Suímo you can find some pyrope small fragments.
The area is now closed to visitors.

Mindat Articles

Mount Suimo Gemstone Mine by Martins da Pedra http://www.mindat.org/article.php/1615

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Mount Suímo Gemstone Mine, Belas, Sintra, Lisbon District, Portugal

Regions containing this locality

Iberian Peninsula

Peninsula - 1,601 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

7 valid minerals.

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Martins de Pedra
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: IST Lisbon mineral collection
'Basaltic Hornblende'
Reference: Artur Neves
'Fayalite-Forsterite Series'
Reference: Martins da Pedra collection
Formula: Mg2SiO4
Reference: Museu Nacional de História Natural e da Ciência, Lisboa – former António Bello (Harvard) collection
'Garnet Group'
Formula: X3Z2(SiO4)3
Description: A black garnet occurs at the locality. Certainly not andradite. Chemical analysis needed.
Reference: Van King; Palácios, T. (1985) - Petrologia do Complexo vulcânico de Lisboa. Tese Doutoramento Univ. Lisboa, 260 p.
Reference: Martins da Pedra collection
Formula: {Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Reference: Palácios, T. (1985) - Petrologia do Complexo vulcânico de Lisboa. Tese Doutoramento Univ. Lisboa, 260 p.
Formula: Fe2+Fe3+2O4
Reference: Museu Nacional de História Natural e da Ciência, Lisboa – former António Bello (Harvard) collection
'Olivine Group'
Formula: M2SiO4
Reference: Souza-Brandão, V. (1913) - Sobre um crystal de Zircão-Jacintho, de Bellas junto a Lisboa. Comun. Com. Serv.
Formula: Mg3Al2(SiO4)3
Reference: Analyzed - Rui Nunes 2009; Palácios, T. (1985) - Petrologia do Complexo vulcânico de Lisboa. Tese Doutoramento Univ. Lisboa, 260 p.
'Pyroxene Group'
Reference: Martins da Pedra collection
Formula: SiO2
Reference: Martins de Pedra
Quartz var: Carnelian
Reference: Martins de Pedra
Quartz var: Chalcedony
Formula: SiO2
Reference: Martins de Pedra
Formula: Zr(SiO4)
Reference: Artur Neves; Souza-Brandão, V. (1913) - Sobre um crystal de Zircão-Jacintho, de Bellas junto a Lisboa. Comun. Com. Serv.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
var: Carnelian4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 9 - Silicates
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Basaltic Hornblende'-
Fayalite-Forsterite Series-
Garnet Group-X3Z2(SiO4)3
Olivine Group-M2SiO4
Pyroxene Group-

List of minerals arranged by Dana 8th Edition classification

Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Insular SiO4 Groups Only with cations in >[6] coordination
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Basaltic Hornblende'-
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3
'Olivine Group'-M2SiO4
'Pyroxene Group'-
var: Carnelian
var: Chalcedony-SiO2

List of minerals for each chemical element

H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Quartz (var: Chalcedony)SiO2
O ForsteriteMg2SiO4
O Garnet GroupX3Z2(SiO4)3
O Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
O MagnetiteFe2+Fe23+O4
O Olivine GroupM2SiO4
O PyropeMg3Al2(SiO4)3
O QuartzSiO2
O ZirconZr(SiO4)
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Na Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg ForsteriteMg2SiO4
Mg Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Mg PyropeMg3Al2(SiO4)3
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Al PyropeMg3Al2(SiO4)3
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Quartz (var: Chalcedony)SiO2
Si ForsteriteMg2SiO4
Si Garnet GroupX3Z2(SiO4)3
Si Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Si Olivine GroupM2SiO4
Si PyropeMg3Al2(SiO4)3
Si QuartzSiO2
Si ZirconZr(SiO4)
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe MagnetiteFe2+Fe23+O4
Zr ZirconZr(SiO4)


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Azevedo, L. M. (1652) - Primeira parte da Fundação, Antiquidades e Grandezas da mvi insigne Cidade de Lisboa ….dedicada ao Illvstre, e Inclito Senado della Officina Craesbeckiana, Lisboa, 398 p.
Souza-Brandão, V. (1913) - Sobre um crystal de Zircão-Jacintho, de Bellas junto a Lisboa. Comun. Com. Serv. Geol. Portugal, t. IX, pp. 125 – 145.
Choffat, P. (1914) - Les Mines de Grenats du Suimo. Comun. Com. Serv. Geol. Portugal, t X: pp. 186 – 198.
Azevedo, P. (1916) - As pedras preciosas de Lisboa (Belas) na História. Archeologo Português, 23, pp.158 – 202.
Provençal, L. (1953) - Description de l’Espagne d’Ahmed Al-Razî. In Al Andaluz, Madrid, vol. XVII, Fasc I.
Coelho, A.B. (1972) - Portugal na Espanha Árabe, Seara Nova, Lisboa, Vol. I.
Palácios, T. (1985) - Petrologia do Complexo vulcânico de Lisboa. Tese Doutoramento Univ. Lisboa, 260 p. (não publicado).
Guerra, A. (1995) - Plínio-o-Velho e a Lusitania. In Arqueologia & História Antiga I. Ed.Colibri F.L.L., Lisboa, 140 p.
Fernandes, L. S. (2002) - Cornelius Bocchus, auctor Lusitanus e notável de Salacia ?. In De Augusto a Adriano. Actas Colóquio Literatura Latina (Lisboa, 2000), EVPHROSYNE Centro de Estudos Clássicos: pp. 155 – 171.
M. Cachão; P. E. Fonseca; R. Galopim de Carvalho; C. Neto de Carvalho; R. Oliveira; M. M. Fonseca; J. Mata (2010): The Suimo gemstone garnet mine. From Plínio-o-Velho and Pauk Choffat to the present. e-Terra, Geopor, ISSN 1645-0388, Volume 18 – nº 20. [Abstract: We present the ancient Mount Suímo gemstone mine (Belas-Sintra County) as a potential site to be classified as a Geological Heritage site. This old mine of garnets (pyrope) produced semi-precious stones since, at least, Roman times, as described by Plínio-o-Velho. However, very few geological/mineralogical works, with the important exceptions of P. Choffat and T. Palácios, have been produced about it, contrasting to the vast list of historical references.].

External Links

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