Stones and Minerals

(Stone Hardness Measurement)

Field trip results from Ujung Genteng (West Java) for Geography subject

in SMAK 3 BPK PENABUR Bandung (Senior High) Indonesia


 

The students who did the laboratory activities:

  1. Edwin 4. Rivan 7. Henny

  2. Ferry 5. Agus 8. Shindy

  3. Ryan 6. Meliana

With teachers, Ms. Ary (Geography), and Mr. Hermawan (English)

More complete report is filed at our web at:


 

Objectives: To observe and identify stones and their characters.

Tools and Stocks:


 

  • Magnifying glass (Loupe) with 10x magnification power (1 Piece)

  • Millimeters scale ruler (1 Piece)

  • Hammer (1 Piece)

  • HCL liquid (low concentrate) (20 cc)

  • Stone samples (1 kit)

  • Stone pictures (1 kit)

  • Any kind of stones collect from site (many)


 

Procedures:

Activity A

  1. Pick 1 of stones collected from site up

  2. Observe briefly with magnifying glass. Compares with stone samples, then identify.

  3. Observe it’s hard level and colours, then identify. (Be sure that the hard level revealed, although it might be too small to see clearly, and the stone colour, will be state that the stone is igneous rock).

  4. Record the result into tables.

  5. Repeat step 1 to 4, for each sample stone collected from site.


 

Observation Table


 

Color of stone

Hardness Level

raw granule

fine granule

glossy

Acid.

Colored (pale) white

X

X

X

X

X

Alkaline

Dark or colored black

X

X

X

X


 


 

Activity B

  1. Pick 1 of stones collected from site up

  2. Observe briefly with magnifying glass. Compares with stone samples, than identify.

  3. Observe it’s interlaying happened or may be fossil trapped in there, and foam forming if the stone dropped with a small drop of low concentrate HCl liquid. (Revealed of interlaying in stone, fossil trapped and foam forming when the stone dropped with a small drop of lower low concentrate HCL liquid, ensure the stone is sedimentation).

  4. Record the result into tables.

  5. Repeat steps 1 to 4, for each sample stone collected from site.


 

Observation Table


 


 

Type of Stone

Form of granule

hard

loose

Coal

X

Andesit

X

Granite

X

Quickstone (Gamping)

X

Chalk

X

 

SMAK 3 Flat Stanley girl observes a stone with a magnifier


 

Drip HCL to measure the acid or alkaline of the stones. Our Flat Stanley girl

is in the pocket of the student with yellow gloves


 

 

Observe activities of the stone research with our teacher, Ms. Ary (back)