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Top 50 Keywords:
material
indoor image
natural
geology
geological
rock
example
sample
angular shape
solid
south africa
specimen
table top image
texture
beautiful
compact
dense
shaped
stone
irregular
abstract
environment
color
collection
finely granular texture
collected
stone texture
natural fragment
small
unworked edges
dull luster
hard
light
wooden surface
faint glint
brown
shape
formed
quartzite
pointed
flat surfaces
rounded
iron-oxide rich rock
ferrous
contains iron
closeup
dark red color
smooth
worn away
dark red-brown

Other Keywords:
selection
sharp edges
black backdrop
fine-grained matrix
oddly shaped
alluvial deposit
waterworn
semi-hard
sharp point
resembles tool
pebble
flat to slightly conchoidal fractures
flat planes
clean edges
concentration of iron minerals
sedimentary rock
partially magnetised
aggregate of minerals
weathered surface
almond shaped inclusions
irregular surface
vesicular mineral inclusions
terrestrial volcanic rock
dark grey
light colored crystal
intrusive igneous rock
andesite
dark iron-oxide zones
cube like fragment
diffuse horizontal banding
block shaped
fine granular texture
sphenocrysts

used as construction aggregate
hematite rich matrix
subtle bands
signs of hematite
red oxidation layer
salt and pepper appearance
found in sills
red streak
contains minor minerals
dolerite
red hematite zones
opaque
not magnetic
shallow intrusive mafic rock
ironstone
iron-oxide rock fragment
found in dykes
used as black granite
mafic
porous surface
red and green shading
subvolcanic
weathered top surface
medium-grained texture
exposed blue-grey inner matrix
blueish fresh groundmass
ironstone pebble
sub volcanic
intergranular texture
hematite
lithification of silt
dar grey crystals
white crystals

variety of nepheline syenite
used as flux
trachytic texture
red crystals
phaneritic
intercrystalline growth
grey backdrop
foyaite rock
contains minerals
phenocrysts
contains elements
silica rich
sedimentary
red hue
microcrystalline quartz matrix
iron oxide
glittering
ferruginous quartz
conchoidal fractures
blue tint
extrusive igneous rock
terrestrial
laminate
clay minerals
kaolinite
interstratification
illite
fluctuating conditions
flakes easily
fissile
fine-grained
ferric iron
color fluctuation

clay-sized mineral particles
clastic sedimentary rock
volcanic
brittle and soft texture
black surface and backdrop
yellow
varying iron content
russet
other pebbles in background
color zones
color differentiation
banded iron formation
alternating layers
mineral