Short answer. No. Article 439 of the Civil Code defines treasure, for legal purposes, as a hidden and unknown deposit of money, jewelry, or other precious objects whose lawful ownership does not appear. If the item's rightful owner can still be traced, it does not meet that definition.
What the law says
By treasure is understood, for legal purposes, any hidden and unknown deposit of money, jewelry, or other precious objects, the lawful ownership of which does not appear.
Civil Code, Article 439 — What Is Treasure. Read the full provision →
The definition turns on the owner being unknown
Article 439 sets out a precise legal definition, not just a common understanding of the word: by treasure is understood, for legal purposes, any hidden and unknown deposit of money, jewelry, or other precious objects, the lawful ownership of which does not appear. The closing phrase, the lawful ownership of which does not appear, is doing the essential work. It is not enough for an item to be hidden and valuable; the article also requires that no lawful owner can be identified.
Why 'does not appear' matters as much as 'hidden and unknown'
An item can be physically hidden and still fail to qualify as legal treasure if its ownership is traceable. The article treats the deposit's status as unclaimed, in the sense that no lawful owner appears, as a defining feature, not an incidental detail. If records, markings, or other evidence still point to who the item lawfully belongs to, the ownership has appeared in the sense the article means, even though the object itself was physically buried and out of sight.
What kinds of objects the definition reaches
Article 439 names money, jewelry, and other precious objects as the kinds of things that can qualify as treasure, so the definition is not limited to gold coins or a narrow class of antiques. Any hidden and unknown deposit of that general character can fit, provided the other condition, the absence of a traceable lawful owner, is also satisfied at the same time.
What this means for an item whose owner can still be traced
Because Article 439 makes an unclear or absent lawful ownership part of the very definition of treasure, an item does not become legal treasure merely by having been buried and forgotten for a time. If the identity of the rightful owner can still be traced, the item falls outside what this article defines as treasure, whatever else may be true about how hidden or valuable it was.
Why this distinction matters beyond the label
Whether an item counts as legal treasure under Article 439 affects how the law treats questions of ownership and division between whoever found it and the owner of the property where it was found, since those rules are built around the treasure definition specifically. An item that instead has a traceable lawful owner is not governed by that same framework, because Article 439 never brings it within the definition to begin with. Establishing whether an owner can genuinely be traced is therefore the threshold question, not an afterthought.