Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Chalcocite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A dark gray nodule of chalcocite with a small bleb of covellite near the top. I collected a hand full of these using a metal detector. A very copper rich specimen.

© Frank Karasti

Goethite, Quartz

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Brown mammillary cluster of goethite on quartz crystals.

© Frank Karasti

Creaseyite, Quartz

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Apple green fibrous crystals of creaseyite on cerussite encrusted by a undetermined gray mineral that I suspect is chrysocolla.

© Frank Karasti

Covellite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A dark blue nodule of covellite with lighter blue chrysocolla. I originally thought this to be chalcocite until I cleaned it. The covellite is throughout the whole rock.

© Frank Karasti

Wulfenite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Window pane wulfenite with blue chrysocolla on a gossan host rock.

© Frank Karasti

Malachite, Quartz

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Green malachite crystals in a quartz vug with an attached small crystal of azurite!

© Frank Karasti

Cerussite, Chrysocolla, Limonite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Colorless crystals of cerussite with blue chrysocolla and brown limonite.

© Frank Karasti

Cerussite, Creaseyite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A patch of cerussite mostly encrusted over by an undetermined blueish gray mineral along with some bonus patches of apple green creaseyite. See child photo for a close up of the creaseyite.

© Frank Karasti

Mimetite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A lemon yellow cluster of mimetite crystals on a gossan matrix.

© Frank Karasti

Mimetite, Hematite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A group of cream colored hexagonal mimetite crystals on hematite.

© Frank Karasti

Smithsonite, Fluorite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Greenish botryoidal smithsonite, colorless spheres of fluorite and blue chrysocolla. The fluorite only was made evident to me by checking with a uv light.

© Frank Karasti

Wulfenite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Almost colorless wulfenite crystals partially embedded in blue chrysocolla.

© Frank Karasti

Wulfenite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Brownish wulfenite crystals with blue chrysocolla on a gossan matrix.

© Frank Karasti

Cerussite, Creaseyite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A patch of cerussite mostly coated by an undetermined blueish gray mineral along with some bonus patches of apple green creasetite. see child photo for a close up of the creasetite.

© Frank Karasti

Adit

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A short adit (Bob's adit) with a carbide lamp written entrance tag. Some decent copper and lead minerals were collected here. March 7, 2026 photo.

© Frank Karasti

Aerial overview

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

An aerial photo looking to the north of the Pearl mine area. March 7, 2026 photo.

© Frank Karasti

Mine dump

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

The Southern portion of the Pearl mine dump. It extends to the north for quite a distance. Plenty of copper and lead mineralization can be seen here. March 7, 2026 photo.

© Frank Karasti

Chalcocite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A dark gray nodule of chalcocite with a small bleb of covellite near the top. I collected a hand full of these using a metal detector. A very copper rich specimen.

© Frank Karasti

Goethite, Quartz

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Brown mammillary cluster of goethite on quartz crystals.

© Frank Karasti

Creaseyite, Quartz

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Apple green fibrous crystals of creaseyite on cerussite encrusted by a undetermined gray mineral that I suspect is chrysocolla.

© Frank Karasti

Malachite, Quartz

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Green malachite crystals in a quartz vug with an attached small crystal of azurite!

© Frank Karasti

Covellite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A dark blue nodule of covellite with lighter blue chrysocolla. I originally thought this to be chalcocite until I cleaned it. The covellite is throughout the whole rock.

© Frank Karasti

Wulfenite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Window pane wulfenite with blue chrysocolla on a gossan host rock.

© Frank Karasti

Cerussite, Chrysocolla, Limonite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Colorless crystals of cerussite with blue chrysocolla and brown limonite.

© Frank Karasti

Cerussite, Creaseyite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A patch of cerussite mostly encrusted over by an undetermined blueish gray mineral along with some bonus patches of apple green creaseyite. See child photo for a close up of the creaseyite.

© Frank Karasti

Mimetite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A lemon yellow cluster of mimetite crystals on a gossan matrix.

© Frank Karasti

Wulfenite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Almost colorless wulfenite crystals partially embedded in blue chrysocolla.

© Frank Karasti

Mimetite, Hematite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A group of cream colored hexagonal mimetite crystals on hematite.

© Frank Karasti

Smithsonite, Fluorite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Greenish botryoidal smithsonite, colorless spheres of fluorite and blue chrysocolla. The fluorite only was made evident to me by checking with a uv light.

© Frank Karasti

Wulfenite, Chrysocolla

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

Brownish wulfenite crystals with blue chrysocolla on a gossan matrix.

© Frank Karasti

Cerussite, Creaseyite

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A patch of cerussite mostly coated by an undetermined blueish gray mineral along with some bonus patches of apple green creasetite. see child photo for a close up of the creasetite.

© Frank Karasti

Adit

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

A short adit (Bob's adit) with a carbide lamp written entrance tag. Some decent copper and lead minerals were collected here. March 7, 2026 photo.

© Frank Karasti

Aerial overview

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

An aerial photo looking to the north of the Pearl mine area. March 7, 2026 photo.

© Frank Karasti

Mine dump

Pearl Mine, Signal Peak area, Black Hills, Mammoth Mining District, Pinal County, Arizona, USA

The Southern portion of the Pearl mine dump. It extends to the north for quite a distance. Plenty of copper and lead mineralization can be seen here. March 7, 2026 photo.

© Frank Karasti