Amber is a fossilised resin (also known as "succinite" or "Karabe"). It generally ranges in colour from yellow to deep orange. Care should be taken not to confuse amber or succinite with ambergris, a secretion of the whale, classified in heading 05.10. Agglomerated amber (or ambroid) is an opaque mineral substance formed by agglomerating amber waste. It falls in this heading only when in plates, rods, sticks or similar forms, not worked after moulding. Jet (black amber) is a compact variety of lignite. It is intensely black, easily carved and takes a high polish. Although employed in the manufacture of jewellery, it is not regarded as a precious stone for the purpose of the Nomenclature.