abstract
backdrop
chemical
chile salpeter
close up
closeup
colorful
countryside
crystal
crystal structure
crystalline
detail
facet
facing
fertilizer
illuminated
light
macro
magnification
micro crystal
microcrystal
microscopic
mineral
multicolored
nature
nitratine
nutrient
pattern
polarised light
polarized light
potassium nitrate
prismatic
refraction
salpeter
scholarship
science
sodium nitrate
structure
translucent
transmitted light