Postby Goldstein » Wed Feb 06, 2019 5:29 pm
Hi yury455 -
Mother-of-pearl is a natural composite of calcium carbonate and organic matter that forms the innermost layer ("hypostracum") or the entire predominantly mineral part of the shell of certain molluscs. Due to its special surface structure, which creates a dull, iridescent sheen upon exposure to light, it finds use in the production of art objects such as jewelry and decorative buttons, cutlery handels etc.
Mother-of-pearl is a typical composite material that can be modeled as a brick wall. Due to the organic material ("mortar") between the hard, but brittle aragonite platelets ("bricks"), cracks can spread only with high energy expenditure. Very dense surface - no - pores!
When you polish the metal parts - be careful not to stain the handles.
Cleaning:
If only greasy and dirty: dish-wash solution and warm water
If scratched: make a paste of warm water and crushed chalk (school/blackboard chalk) and polish the scratches. Rinse with warm water.
Polishing of gilded knife blades (objects):
Spray with a common tile-cleaner (citrus vinegar), wipe and polish with some cotton and a silverpolish. It is always a good idea to test the tile-cleanner on a small corner of the object - because sometimes the gilding is very, very thin! But your knives look "very high quality" gilded.
A very nice and not often seen find! Congratulations!
Regards
Goldstein