NATIVE GOLD Maryland Gold Mine (Montgomery County), Courtesy U.S. National Park Servicie, Jake Slagle photographer

NATIVE GOLD Montgomery County, Maryland (Montgomery County), Smithsonian Collection, Jake Slagle photographer

NATIVE GOLD Maryland Gold Mine (Montgomery County), Fred Parker Collection, Jake Slagle photographer

NATIVE GOLD Great Falls Mine (Montgomery County), Harvard Mineralogical Museum Collection, Jake Slagle photographer

CHROME TOURMALINE Etchison Mine Montgomery County, Maryland Natural HIstory Society of Maryland Collection Photo by Jake Slagle

NATIVE GOLD Montgomery County, Maryland (Montgomery County), Michigan Tech Collection, George W. Robinson w/ permission from John S. White photographer

Almandine, Northwest Branch, Mtgy. County, Collected by Fred Parker, Collection of Jake Slagle,, Photograph by Jake Slagle

Opal (Var. Hyalite) White Oak, Mtgy Co., Maryland, Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photographer

ANALCIME Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

ARAGONITE Hunting Hill Quarry, Rockville,Montgomery County), Acquired from Fred Parker, Jake Slagle Collection, Jake Slagle photographer

BORNITE, GROSSULAR: Hunting Hill Quarry, Rockville, Mtgy. Co. Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photo

BRUCITE: Hunting HIll Quarry, Rockville (Mtgy Co.), Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photogrpaher

CALCITE (Elongated) Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

CALCITE (Yellow and Fluorescent}: Hunting HIll, Rockville, Mtgy. Co., Collected by Fred Parke, Jake Slagle Collection

CALCITE ON PREHNITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

CHALCOCITE rimming DIOPSIDE on CALCITE with GROSSULAR Hunting Hill Quarry, Rockville (Montgomery County), Fred Parker Collection, Jake Slagle photographer

Clinochlore, Minor, Diopside, Grossular: Hunting Hill Quarry, Mtgy. Co., Maryland, Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photographer

CLINOCHRYSOTILE: Hunting Hill Quarry, Rockville (Mtgy. Co.), Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photograph

CLINOZOISITE: Hunting Hill Quarry, Rockville, Montgomery Co., Maryland, Collected by Fred Parker, Jake Slagle Photographer.

CLINOZOISITE (Terminated) Hunting Hill Quarry, Rockville (Montgomery County), Collected by Fred Parker, Jake Slagle Collection, Jake Slagle photographer

COALINGITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

COALINGITE CRYSTALS (photomicrograph) Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

DESAUTELSITE: Hunting Hill Quarry, Rockville, Montgomery County, Maryland; Harvard MIneralogical Museum Collection, Jake Slagle Photogrpher

DIOPSIDE (2 Habits)" Hunting Hill Quarry, Rockville, Montgomery Co., Maryland, Colection of Jake Slagle, Photographer Jake Slagle

DOLOMITE: Hunting HIll Quarry, Rockville, Mtgy,. Co., Collected by Fred Parker, Jake Slagle Collection Jake Slagle Photo

DOLOMITE ps RHOMBIC CALCITE: Hunting Hill, Rockville, Mtgy Co. Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photograph

DOLOMITE: Hunting Hill Quarry, Rockville, Mtgy Co., ex-George Loud, Jake Slagle Collection, Jake Slagle photo

ERYTHRITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

Galena (Spinel Twin) Hunting Hill Quarry,Rockville, Montgomery Co., Maryland, Bob Eberle Collection, Jake Slagle Photographer

Fluorapatite, Hunting HIll Quarry, Rockville, Montgomery Co., Maryland, Collected by Fred Parker,Jake Slagle Collection, Jake Slagle Photogrpaher

GROSSULAR (Garnet Group) Hunting Hill Quarry, Rockville (Montgomery County), Fred Parker Collection, Jake Slagle photographer

GROSSULAR (Garnet Group) with white DIOPSIDE XLS. Hunting Hill Quarry, Rockville (Montgomery County), Fred Parker Collection, Jake Slagle photographer

GROSSULAR (35 ct. cut gemstone): Hunting Hill Quarry, Rockville, Montgomery Co., Maryland, Collected and faceted via Jon Ertman, Jake Slagle Collection , Jake Slagle Photographer

Heulandite: Hunting Hill Quarry, Mtgy. Co., Maryland, Collected by Fred Parker, Fred Parker Collection, Jake Slagle Photographer

Magnesite: Hunting Hill Quarry, Mtgy. Co., Maryland, Collected by Fred Parker, Jake Slagle Collection.

MAGNETITE XLS. Hunting Hill Quarry, Rockville, Mtgy. Co., Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photo

Malachite, Pargasite: Hunting Hill Quarry, Rockville, Montgomery Co., Maryland, Jake Slagle Collection, Jake Slagle Photographer

McGuinnessite: Hunting Hill Quarry, Montgomery Co., Maryland, Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photographer

MESOLITE on PREHNITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

McGUINNESSITE CRYSTALS (photomicrograph) Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

Molybdenite: thin plates in Calcite: Hunting Hill Quarry, Mtgy Co., Maryland, Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photogrpher

PENTLANDITE: Hunting Hill Quarry, Rockville, Mtgy. Co., Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photo

POKROVSKITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

POKROVSKITE PHunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

PREHNITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

PYRITE (intergrown Cubes) on MAGNESITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

PYROAURITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

SCOLECITE on CALCITE Hunting Hill Quarry, Rockville (Montgomery County), Jake Slagle Collection, Jake Slagle photographer

SERPENTINE ps CHLORITE: Hunting Hill Quarry, Rockville, Mtgy. Co., Collected by Fred Parker,Jake Slagle Collection, Jake Slagle Photographer

GREEN BOTROYDAL SERPENTINE AND MASSIVE SERPENTINE: Hunting Hill Quarry, Rockville, Mtgy. Co., Collected by Fred Parker, Jake Slagle Collection. Jake Slagle Photo.

SPHENE: Hunting Hill Quarry, Rockville, Montgomery Co., Maryland , Jake Slagle Collection, Jake Slagle photographer

Sphene: Hunting Hill Quarry, Rockville, Montgomery Co., Maryland, Fred Parker Collection, Jake Slagle Photographer

TOCHILINITE: Hunting Hill Quarry, Collected by Fred Parker, Jake Slagle Collection, Photo by Jake Slagle

VESUVIANITE Hunting Hill Quarry, Rockville (Montgomery County), Fred Parker Collection, Jake Slagle photographer

XONOTLITE: Hunting Hill Quarry, Montgomery County, Maryland., Collected by Fred Parker, Jake Slagle Collection, Jake Slagle Photographer