Blue "Opal Wood" Garut, Indonesia

This unusual material, often called "Opal Wood" by locals, originates from Garut, Indonesia. It features a striking mix of blue-green hues with earthy inclusions, along with distinct dark vein-like structures. While some believe it to be opalized wood, its true identity remains uncertain without further analysis.   The dark veining may represent fossilized wood grain or mineral-filled fractures, but no clear cellular wood structures are visible. The material closely resembles common opal or chalcedony with sedimentary inclusions, likely formed in a silicified fossil-bearing environment. Its waxy to slightly vitreous luster suggests a silica-based replacement, while the absence of play-of-color confirms it as common opal rather than precious opal.   Without microscopic analysis or spectroscopic testing, it is difficult to confirm whether this is fully opalized wood or an opalized sedimentary material. Regardless of its classification, its unique color patterns and intriguing formation m