noun, noun which may take the genitive case particle 'no'
Refers to the fossilized tree resin, often used in jewelry and decorative items. Can also describe the amber color.
琥珀のネックレスを母からもらった。
I received an amber necklace from my mother.
琥珀色の液体が瓶に詰められていた。
An amber-colored liquid was bottled.
樹脂 is a general term for resin, while 琥珀 specifically refers to fossilized resin (amber).
The kanji 琥珀 are ateji (phonetic equivalents) used for the Chinese-derived word. The exact historical derivation is uncertain, but the term has been used in Japanese for centuries to refer to amber.