Irregular fragments of varying sizes. Waste products from artisanal glass production.
87
Glass Fragments
Origin
Castro de Alvarelhos, Alvarelhos, Trofa.
Material
Green glass containing numerous impurities and air bubbles. Chemical analysis by X-ray fluorescence spectrometry indicates a calcium silicate glass composition: Ca 14%, Na₂O 7%, Mn 2%, Fe 2%. Virtually free of lead, tin, antimony and copper.
Description
Classification and chronology
Type … / Castro de Alvarelhos - Phase IV/V
Dimensions
87 – Maximum length: 42 mm; Maximum thickness: 11 mm.
88 – Maximum length: 51 mm; Maximum thickness: 9 mm.
89 – Maximum length: 35 mm; Maximum thickness: 5 mm.
90 – Maximum length: 42 mm; Maximum thickness: 5 mm.
91 – Maximum length: 31 mm; Maximum thickness: 1 mm.
92 – Maximum length: 18 mm; Maximum thickness: 7 mm.
Deposit
MMAP [ALV93B3A1 (M12-02), op. 52 (3 frag.) /31 (2 frag.) /152]
Bibli.
MOREIRA 2007, 144.
