Orchid image from: www.orchidweb.com
Surakarta formal Keris from Java

Seven wave (or
Luk) blade, with a dense, high contrast pattern (or
Pamor) called Wos wutah (or scattered rice grains). The handle (or
Ukiran) and the top of the sheath (or Wrongko) are beautifully
sculpted from burl teak (
jati gembol) with a striated grain and mild
chatoyancy.