The world's first integrated stone asset protection and zero-discharge environmental compliance practice. Where precision science meets the most valuable surfaces on earth.
Stone is not merely a surface. It is chemistry, biology and physics expressed in mineral form — shaped by pressure and time into something with a mineral identity, a geological memory, and a pattern of response to its environment that most practitioners never stop to understand.
The granite beneath your feet took three hundred million years to become what it is. The marble on that hotel lobby floor began as a living seabed. Every stone carries a history — and responds to its environment accordingly.
Those who understand that see what others cannot. Those who do not are working blind — confidently, expensively, and irreversibly blind.
We built AuditStone™ around that understanding — applying first principles science to a discipline that never knew it was missing.
Precision evaluation, restoration and certification of high-value natural stone across superyacht interiors, luxury hotels, seaside resorts and premium residential installations. We assess what others assume. We document what others ignore. We restore what others cannot.
Serving the superyacht sector, five-star hospitality, and the luxury residential market of the Subic Bay Freeport Zone and beyond.
The world's first zero-discharge certification standard for maritime and hospitality maintenance operations. While the world's regulators focus on emissions, the effluent discharged with every maintenance cycle — in every port, on every coast, under every flag — remains entirely unaddressed.
No international standard exists. No certification framework exists. No port anywhere has solved this. Until now.
The reef and the stone share more than proximity.
Both are mineral systems with integrity worth protecting.
Both are damaged by the same indifference.
And both deserve the care that matches their value.
Subic Bay is where this standard gets built. The benchmark from which every port that follows will measure itself.
AuditStone™ and GreenHarbor Certified™ are founded by Andrew Tulloch — bringing BSc (Biology) diagnostic methodology, Master Stone Restoration credentials, and Italian Klindex planetary precision technology to a discipline that has operated largely on habit and assumption.
We work with a select number of clients whose stone assets and environmental commitments reflect the standards we hold ourselves to. If you are considering a conversation, we welcome it.