Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil

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Alumotantite : AlTaO₄, Simpsonite : Al₄(Ta,Nb)₃O₁₃(OH,F)
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil Verdigris Alumotantite on an orange Simpsonite Collected in 1943 Sample size: 1,5 X 0,5 cm Collection and photo: Arliguie M
© Arliguie M	Photo ID: 141371 View Count: 363
Beryl (Var: Heliodor) : Be₃Al₂Si₆O₁₈
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil Heliodor from Alto do Giz pegmatite, Equador, Seridó Oriental, Rio Grande do Norte This is a floater, doubly terminated, very gemmy, and a pleasant golden color, as one would hope for in a Heliodor Beryl. Simply perfect. Size:7.7 x 2 x 1.6 cm
© fabreminerals.com	Photo ID: 55929 View Count: 378
Cassiterite : SnO₂
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil 2.6 x 2.1 cm lustrous, translucent twin crystal of cassiterite.
© 1995-2001 Trinity Mineral Co.	Photo ID: 1481 View Count: 544
Cassiterite : SnO₂
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil Macle with 2cm - July of 2001
© Martins da Pedra	Photo ID: 43945 View Count: 253
Cassiterite : SnO₂
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil A cassiterite crystal with several quartz crystals on the surface, measuring 1 1/4 x 1.0 x 3/4 inches. Crystal-Odyssey specimen. gemcrystals@aol.com
© Joseph A. Freilich	Photo ID: 65857 View Count: 215
Elbaite : [Na][(Li,Al)₃][Al₆][(OH)₃\|OH\|(BO₃)₃\|Si₆O₁₈]
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil Single watermelon tourmaline crystal 25 mm long in bluish cleavelandite matrix with lavener lepidolite. The watermelon tourmaline has a dark green rind with deep pink center. Overall size of mineral specimen: 7x5x3.5 cm. Size of individual crystals: 2.5 cm.
© 2002 John H. Betts	Photo ID: 6191 View Count: 470
Elbaite : [Na][(Li,Al)₃][Al₆][(OH)₃\|OH\|(BO₃)₃\|Si₆O₁₈]
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil Four long watermelon tourmaline crystals up to 5 cm long in bluish cleavelandite matrix with lavener lepidolite. The watermelon tourmalines have dark green rinds with deep pink centers. Overall size of mineral specimen: 8x7x6 cm. Size of individual crystals: 1-5 cm.
© 2002 John H. Betts	Photo ID: 6192 View Count: 448
Euclase : BeAl[OH\|SiO₄]
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil Crystal with 1,5x1,5x1cm - September of 2004
© Martins da Pedra	Photo ID: 42497 View Count: 592
Euclase : BeAl[OH\|SiO₄]
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil Several lustrous euclase crystals with no matrix. The euclase crystals are colorless with blue-green areas. No damage. Ex. A. Stevenson collection #874. Overall size of mineral specimen: 22x16x14 mm. Size of individual crystals: 5-15 mm.
© 2001 John H. Betts	Photo ID: 1178 View Count: 883
Euclase : BeAl[OH\|SiO₄]
	Alto do Giz pegmatite, Equador, Borborema mineral province, Rio Grande do Norte, Northeast Region, Brazil A vibrantly blue, lusterous crystal from the Willy Israel collection. 16 x 9 mm. Crystal-Odyssey specimen. gemcrystals@aol.com
© Joseph A. Freilich	Photo ID: 68536 View Count: 524