pedras preciosas
TRANSCRIPT
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PROF. LUCIANA PETRY
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As pedras preciosas são minerais que têm cor e brilho especiais, sendo valiosas por sua raridade e dureza
Pedras preciosas encontradas no território brasileiro:
Diamante
Rubi
Safira
Esmeralda
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DEPOIS DE LAPIDADO RECEBE O NOME DE BRILHANTE
GERALMENTE É INCOLOR, MAS PODE APRESENTAR LIGEIRA COLORAÇÃO AZUL, AMARELA, VERMELHA, ROSA OU VERDE
É A PEDRA MAIS RARA QUE EXISTE
NO BRASIL PODE SER ENCONTRADO EM DIAMANTINA, SENDO SEPARADO DO CASCALHO E DA AREIA DE RIOS POR GARIMPEIROS.
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DIAMANTES
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Cidade brasileira de Diamantina, em Minas Gerais
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GARIMPEIROS
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RUBI
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ESMERALDA
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Água-marinha, turmalina, topázio, ametista e cristal de rochas
São minerais que podem ser considerados bonitos como as pedras preciosas, mas não são tão raros nem tão resistentes
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1 - Turquesa, 2 - Hematita, 3 - Crisocola, 4 - Olho de tigre 5 - Quartzo, 6 - Turmalina, 7 - Cornalina, 8 - Pirita, 9 - sugilite,
10 - Malaquita, 11 - Quartzo rosa, 12 - Obsidiana, 13 - Rubi, 14 - Ágata muscínea, 15 - Jaspe, 16 - Ametista, 17 -
Ágata azul, 18 - Lápis-lazúli
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Água-marinha
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água-marinha lapidada para anel, em foto da Joalheria H. Stern.
água-marinha com lapidação cabochão oval, em foto do site Companhia das Gemas.
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TURQUEZA
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PEPITA DE OURO
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Escultura em ouro com placa em lápis-lazúli, representando os deuses egípcios Hórus, Osíris e Ísis, 874-850 a.C., 22ª dinastia
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PROFª. LUCIANA PETRY