In 2018, Larry and Pat Gotuaco donated their petrified wood collections to the National Museum of the Philippines. The collections include  88 foreign woods from the USA, Indonesia, India, Burma, Saudi Arabia, and Greece. Also part of the collections are eight large pieces of petrified wood from Cagayan, Iloilo, and Mindoro. The collections  display wood structures preserved in detail and shaded in vivid hues and complex color patterns. 

The mineral present determines the colors of the wood such as blue-green color from chromium, copper, and cobalt-rich minerals; red-brown, orange, pink and yellow color from manganese and iron-rich minerals; transparent white and gray color from silica-rich mineral; and black color from carbon-rich mineral.