Papakolea Beach
Interesting facts
- The cone sheltering the beach, Puʻu Mahana, formed more than 49,000 years ago on the southwest rift zone of Mauna Loa.
- Papakōlea means plover flats in Hawaiian, after the Pacific golden plovers that winter on the land around the crater.
- Its best-known counterpart is Punta Cormorant on Floreana in the Galápagos, often named as the only other true green sand beach on Earth.
- Gem-quality olivine is known as peridot, and in Hawaii the green crystals have long been nicknamed Hawaiian diamonds.
- The green colour of the crystals comes from ferrous iron locked inside the olivine.
- Elsewhere on the Big Island olivine stays locked in hard lava; here it sits in loose ash, which the sea easily washes free.
- Geologists still debate how the cone formed: some see a littoral cone built where lava met the sea, others argue the shoreline lay too far away during the Ice Age.
- According to the US Geological Survey, the last lava flow in the area ended more than 10,000 years ago, making it one of the calmer corners of Kaʻū.
Why it is worth it
The sand at Papakolea is green because a volcanic cone is quietly falling apart above it. The headland enclosing the beach is a littoral cone built from an old Mauna Loa-era eruption, rich in olivine — a dense, iron-and-magnesium silicate that's among the very first minerals to crystallize as volcanic magma cools. As the cone erodes, waves sort the debris: heavier olivine crystals settle and accumulate on the beach while lighter black basalt sand gets carried back out to sea, leaving a shoreline that's an extraordinary 88 to 92 percent olivine crystal by weight.
That concentration is what actually makes the place rare, not just the color. Sources differ on the exact count, but there are only a small handful of green sand beaches known anywhere on Earth, and most of them are far more diluted with ordinary sand than Papakolea — this is close to as pure an olivine beach as the planet produces.
It's also worth seeing precisely because it won't look like this forever. Olivine breaks down faster, both mechanically and chemically, than the quartz sand found on most beaches, and the cone supplying it is a finite, steadily eroding source with nothing replenishing it. In geological terms — thousands of years, not human lifetimes, but still a blink — the green is a passing phase rather than a permanent feature of the coastline.
Getting there
106 km from Hilo. Ellison Onizuka Kona International Airport at Keāhole (KOA) is about 98 km away.
On these lists
From the encyclopaedia
Papakōlea Beach is a green sand beach located near South Point, in the Kaʻū district of the island of Hawaiʻi. It is one of only two green sand beaches in the world, the other being Punta Cormorant on Floreana Island in the Galapagos Islands It gets its distinctive coloring from olivine sand eroded out of the enclosing volcanic cone.
Wikipedia · CC BY-SA 4.0
18.93639, -155.64639per Wikidata