Classification of Baltic Amber (succinite) Gemstones By The International Amber Association
- Natural Baltic amber – gemstone which has undergone mechanical treatment only (for instance: grinding, cutting, turning or polishing) without any change to its natural properties
- Modified Baltic amber – gemstone subjected only to thermal or high-pressure treatment, which changed its physical properties, including the degree of transparency and color, or shaped under similar conditions out of one nugget, previously cut to the required size.
- Reconstructed (pressed) Baltic amber – gemstone made of Baltic amber pieces pressed in high temperature and under high pressure without additional components.
- Bonded Baltic amber – gemstone consisting of two or more parts of natural, modified or reconstructed Baltic amber bonded together with the use of the smallest possible amount of a colorless binding agent necessary to join the pieces.
Read more about this topic: Amber
Famous quotes containing the words amber and/or association:
“Swimmer of noonday, lean for the perfect dive
To the dead Mother’s face, whose subtile down
You had not seen take amber light alive.”
—Allen Tate (1899–1979)
“... a Christian has neither more nor less rights in our association than an atheist. When our platform becomes too narrow for people of all creeds and of no creeds, I myself cannot stand upon it.”
—Susan B. Anthony (1820–1906)