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Stream gravel quartz from Howard County Maryland

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Author

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Jim Wilkinson

Joined: 16 Jan 2021
Posts: 30
Location: Maryland

Posted: Jan 24, 2021 21:30 Post subject: Stream gravel quartz from Howard County Maryland

Quartz and associated minerals I have found in stream gravels in the Piedmont of central Maryland, mostly Howard County

Quartz out 2 (2).jpg

Mineral:

Quartz, rock crystal

Dimensions:

12 x 4.5 cm

Description:

Viewed:

12802 Time(s)

smok qtz 2 (2).jpg

Mineral:

Quartz (variety smoky quartz)

Dimensions:

10 x 5.5 cm

Description:

Viewed:

12762 Time(s)

brookite (2).jpg

Mineral:

quartz--smoky quartz?

Dimensions:

6 x 4 cm

Description:

odd striated look on crystalline quartz in sample

Viewed:

12599 Time(s)

Brushrun2 - Crop (2).jpg

Mineral:

Quartz variety smoky quartz

Dimensions:

3.5 x 2 cm

Description:

from stream gravels in Columbia, Maryland

Viewed:

11839 Time(s)

albite (2).jpg

Mineral:

quartz, feldspar, mica

Dimensions:

7 x 5 cm

Description:

found on roadcut near stream

Viewed:

11811 Time(s)

mar mica (2).jpg

Mineral:

Mica

Locality:

Howard County, Maryland, USA

Dimensions:

4.5 x 3.3 cm

Description:

from gravel bar in stream

Viewed:

11315 Time(s)

amyt 1 (2).jpg

Mineral:

Quartz, variety amethyst

Locality:

Howard County, Maryland, USA

Dimensions:

1.5 x 1.0 cm

Description:

from Patapsco River valley

Viewed:

11301 Time(s)

band marb (2).jpg

Mineral:

mica (biotite or phlogopite), marble

Locality:

Howard County, Maryland, USA

Dimensions:

3.75 x 3 cm

Description:

Viewed:

11233 Time(s)

mica white (2).jpg

Mineral:

mica, quartz, feldspar

Locality:

Howard County, Maryland, USA

Dimensions:

7 x 4.5 cm

Description:

crystals appear- to be mica but metallic looking

Viewed:

11253 Time(s)

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