AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Mexico > Calcite (interpenetrant-twinned crystals) with Calcite overgrowth

Calcite (interpenetrant-twinned crystals) with Calcite overgrowth from Naica District, Saucillo, Chihuahua, Mexico

Photo below under shortwave ultraviolet illumination:

Photo below under longwave ultraviolet illumination:

DESCRIPTION:	No. 90140
Mineral:	Calcite (interpenetrant-twinned crystals) with Calcite overgrowth
Locality:	Naica District, Saucillo, Chihuahua, Mexico
Description:	Two large interpenetrant-twinned rhombohedral calcite crystals to 75 mm with overgrowth of a second generation of lustrous transparent colorless calcite crystals to 2 mm. Under shortwave fluorescent illumination the calcite fluoresces orange. Ex. Paul Seel (1904-1982) collection #4899; the mineral Seelite was named in his honor.
Overall Size:	9.5x6.5x6 cm
Crystals:	1-75 mm
Archived:	For reference only

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