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Opal from
Vulcan Materials Company Crushed Stone Quarry (Manassas Quarry), Manassas, Prince William Co., Virginia, USA

Locality type:Quarry
Formula:SiO2 · nH2O
Validity:Believed Valid
References:Minerals of Virginia 1990 by R. V. Dietrich
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Vulcan Materials Company Crushed Stone Quarry (Manassas Quarry), Manassas, Prince William Co., Virginia, USA
Nearest other occurrences of Opal
10.6km (6.6 miles) A Centreville, Culpeper Basin, Fairfax Co., Virginia, USA
35.7km (22.2 miles) B Old Goose Creek Quarry (Arlington Stone Company Quarry; Belmont Quarry), Leesburg, Loudoun Co., Virginia, USA
46.1km (28.6 miles) C Hunting Hill quarry (Rockville Crushed Stone Quarry; Travilah Quarry; Rockville Quarry; Bardon Stone Quarry; Aggregate Industries Quarry), Rockville, Montgomery Co., Maryland, USA
53.6km (33.3 miles) D White Oak, Montgomery Co., Maryland, USA
58.7km (36.4 miles) E Berryville Mine (Keneagy Ore Bank), Clarke Co., Virginia, USA
66.6km (41.4 miles) F Cedar Mountain Stone Corp. Quarry (A. H. Smith quarry), Mitchell, Culpeper Co., Virginia, USA
67.1km (41.7 miles) G Old Greensand-Diatomaceous Earth Pit, Calvert Co., Maryland, USA
82.6km (51.3 miles) H Allah Cooper Mine (Alley-Cooper Mine; Ali Cooper Mine; Valcooper Mine), Gold-Pyrite Belt, Louisa Co., Virginia, USA
91.7km (57.0 miles) I Delight Quarry (Soldier's Delight Quarry; Dyer Quarry), Soldiers' Delight ridge, Delight, Baltimore Co., Maryland, USA
99.3km (61.7 miles) J Unnamed Chromite prospects, Bare Hills, Baltimore Co., Maryland, USA
99.4km (61.8 miles) K Bare Hills Serpentine Quarry East, Bare Hills, Baltimore Co., Maryland, USA
105.4km (65.5 miles) L Stony Point Mine, Stony Point, Albemarle Co., Virginia, USA
112.7km (70.1 miles) M Teeter Quarry (Teeters Quarry; Valley Quarry; John S. Teeter and Sons Co. Quarry; Gettysburg Quarry; H.T. Campbell's Teeter's Quarry), Gettysburg, Adams Co., Pennsylvania, USA
145.1km (90.1 miles) N Maryland Green Marble Corporation Quarry (Cardiff Serpentine Quarry), Harford Co., Maryland, USA
145.1km (90.1 miles) O Cardiff Serpentine Quarry, Cardiff, Woodensburg-Cardiff district, Harford Co., Maryland, USA
153.2km (95.2 miles) P Wiant's Quarry (Weiant Quarry), Pilot, State Line District, Cecil Co., Maryland, USA
155.0km (96.3 miles) Q Buck Hill, Parnassus, Augusta Co., Virginia, USA
159.4km (99.0 miles) R Morefield Mine (Morefield pegmatite), Winterham, Amelia Co., Virginia, USA
162.8km (101.2 miles) S Amelia (Amelia Court House), Amelia Co., Virginia, USA
209.4km (130.1 miles) T Kenbridge Quarry, Lunenburg Co., Virginia, USA
218.0km (135.5 miles) U Dyer Quarry, Gickerville (Gibralter), Birdsboro, Berks Co., Pennsylvania, USA
Mineral and/or Locality  
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