People try to catch offerings thrown off the summit of Mount Bromo volcano by Tengger tribe members and local tourists in Probolinggo, East Java province on July 18, 2019, as part of the Yadnya Kasada Festival. During the annual Yadnya Kasada festival, the Tenggerese climb Mount Bromo, an active volcano, and seek the blessing from the main deity by presenting offerings of rice, fruit, livestock and other items. (Photo by Juni Kriswanto/AFP Photo)

Vietnam's Khuat Phuong Anh (R) celebrates winning the women's 800m final during the 31st Southeast Asian Games (SEA Games) at My Dinh National Stadium in Hanoi on May 16, 2022. (Photo by Navesh Chitrakar/Reuters)

A cow moves past a burning car that, according to fire officials, caught fire by an electrical short circuit after it was stuck in a water-logged road following heavy rains in Ahmedabad, India, July 11, 2022. (Photo by Amit Dave/Reuters)

Firefighters are seen through heat from flames as they battle the Apple fire near Banning, California on August 1, 2020. 4,125 acres have burn in Cherry Valley, about 2,000 people have received evacuation orders in the afternoon of August 1. Around 8PM the fire spread to 12,000 acres. (Photo by Josh Edelson/AFP Photo)

Horses are spooked as the Woolsey Fire moves through the property on Cornell Road near Paramount Ranch on November 9, 2018 inAgoura Hills, California. About 75,000 homes have been evacuated in Los Angeles and Ventura counties due to two fires in the region. (Photo by Matthew Simmons/Getty Images)

Cambodia’s Meth Sopheaktra and Pal Chhor Raksmy perform in the women's Vovinam self-defense event during the 32nd Southeast Asian Games (SEA Games) in Phnom Penh on May 8, 2023. (Photo by Tang Chhin Sothy/AFP Photo)

Fire ravages vegetation during the Cerro de los Pinos wildfire on August 04, 2025 in Cáceres, Spain. Firefighters from Cáceres and INFOEX forest firefighters are battling fires, as high temperatures continue to put the Extremadura region at extreme risk of further wildfires. (Photo by Carlos Gil Andreu/Getty Images)

There is an endless bounty of eye-catching gemstones throughout the world and this spectacular boulder opal is one unique beauty that looks like a shimmering crystal encased in a tree fossil. Its opalescent sheen seeps through the cracks of the seemingly wooden rings in lustrous hues of emerald green and aqua blue. Like something out of a fairy tale, the triangular piece radiates through an organic pattern mimicking the growth rings of tree.