Peter S. Tjioe

Creative Director

Founder of MM Galleri Group and current Creative Director of MM Galleri Group. From a small office selling marble tiles in 1992, his business grows into multi-million-dollar corporate group.

MM Galleri Group present in various location throughout Indonesia and Singapore. His business covers quarry, fabrication of slabs & tiles, manufacturing furniture from rattan and stone, project installation, and stone chemical treatment.

Experienced with national and international project from housing to buildings, he has knowledge on stone application to its characteristic and treatment. Numerous Contractors, Architects, Interior Designers and Project Owners trusted his advice on their project.

After his constant attempts and explorations on stone characteristic, he is capable to make stone ultra-thin, but also bend and curve stone to fit many designs. From then, he is known as the pioneer of world's first bended marble technology and one of the first innovator for thin marble technology.

Fenny W. Oei

Marketing Director

Holding the position of Marketing Director of MM Galleri Surabaya for more than 20 years, she led the marketing division to cooperate with Contractors, Architects, Interior Designers and Project Owner.

Experienced in providing the best sales experience and handling multitude project demand, she is trusted by numerous recurring Contractors, Architect, Interior Designers. She has the ability to maintain a positive experience while browsing your material of choice.

Many trusted her to supply wide range of natural stones variation on many projects throughout Java. People tend to trust her recommendation Architects and Interior Designers, her choice of stones and her taste in design.

Hillary Tjioe

Singapore HQ Director

After finishing her education in Singapore and trying Biotechnology at Temasek Polytechnic, she pursues a Management degree from University of British Columbia in Canada. While taking that degree, she also learns from the world’s foremost authority on diamonds, colored stones, and pearls, Gemological Institute of America.

She starts her career training and provide back-up for four new customer service and earned a reputation for friendly customer service. Nowadays, having trusted by clients to collaborate with top designers and architects, she strives to create the best unique experience.

Experienced in providing more than 400 different types of stone alternatives and handling high net-worth private housing and buildings clients, she has wide range of knowledge in stone industry.

Hengky Djaja

Jakarta & Bali Main Office Director

Jakarta Main Office Director of MM Galleri, one of the largest natural stone companies. His leadership spans over 20 years with experience in crafting customized marketing and operational plans to align with company objectives.

Thorough knowledge of the national market and ability to maintain positive and trust-based relations with business partners, he is highly trusted in supplying a wide range of natural stones, providing solutions to architects, interior designers, developers, and homeowners.

Known in this industry for his systematic management style, he currently has over 100 hundred loyal employees at the company headquarters and project site.


Lapitec is an innovative "full body" sintered stone slab. Available in large format slabs, it unites aesthetic design appeal and the superior mechanical and physical properties of porcelain with the elegance, workability, colours and typical finishes of natural stone.


Silestone is a combination of natural quartz and other raw materials that are extraordinarily hard and resilient. These characteristics combine to create an ideal surface for kitchen countertops, bathrooms, flooring and wall siding.


New ultra-compact surface that offers extreme performance and unique design. Dekton employs exclusive Sinterized Particle Technology, a high tech process which represents an accelerated version of the metamorphic change that natural stone undergoes when subjected to high temperatures and pressure over thousands of years.


Adhesive mortar combining cement with selected grades of sand and several admixtures for the construction, and industrial adhesive markets.


Providing innovative solutions that focus on the environment and on improving both health and quality of life by using eco-friendly and naturally breathable building materials that avoid the most common illnesses caused by indoor pollution.