About us
Where Heritage Meets Fine Gemstones
We celebrate the natural beauty and rarity of Ceylon gemstones, with a special focus on world-renowned Sri Lankan sapphires. Rooted in heritage and guided by modern standards, we bring nature’s finest treasures from the source to discerning customers around the world.
Our work reflects authenticity, expertise, and deep respect for the origin of every gemstone we offer.
Double H Whiteleaf was founded with a clear and purposeful vision:
to connect Sri Lanka’s centuries-old gem industry with the global gemstone and fine jewellery market.
Coming directly from the gemstone trade, our founders possess first-hand knowledge of gemstone sourcing, grading, and selection. This deep industry experience allows us to carefully curate exceptional natural stones and present them with transparency and confidence.
What began as a passion for gemstones has evolved into a trusted platform offering ethically sourced, certified Ceylon sapphires to customers worldwide.
to connect the world’s finest natural gemstones with customers who value authenticity, ethics, and lasting value
To be a globally trusted gemstone brand, recognized for uniting exceptional natural gemstones with discerning customers through authenticity, ethical sourcing, and enduring value.
From Sri Lanka to the World
To strengthen our international presence and operate under global business standards, Terrene Group Pty Ltd was incorporated in Australia.
Through this structure, Double H Whiteleaf proudly provides:
- Certified natural Ceylon sapphires
- Carefully selected gemstones with verified authenticity
- International sales supported by Australian governance, compliance, and transparency
This dual presence allows us to combine Sri Lankan gem expertise with Australian business integrity, delivering trust and excellence across borders.
Managing Partners
Geeshan Madushanka Hettiarachchi holds a Bachelor of Accountancy (Special) Degree from the University of Kelaniya, Sri Lanka.
With expertise in accounting, compliance, and international operations, he manages transparency, quality assurance, and cross-border coordination, ensuring professional standards across all activities.
Our Commitment to Ethical Sourcing
We work closely with small-scale gem miners and trusted suppliers in Sri Lanka, helping connect local expertise with the global market.
Our commitment ensures:
- Support for local mining communities
- Ethical and transparent sourcing practices
- Responsibly mined, natural gemstones for our customers
Every gemstone we sell is 100% natural and accompanied by recognized gemological certification, giving our customers complete confidence in quality and origin.
Founders' Message
At the heart of our journey is a deep respect for nature, craftsmanship, and trust.
Growing up close to the rich gemstone heritage of Sri Lanka, We witnessed firsthand the extraordinary beauty and rarity of natural gemstones especially Ceylon sapphires. Yet, I also saw how authenticity and ethical sourcing were often overlooked in a global market driven by volume rather than value. This inspired me to build a business founded on transparency, integrity, and long-term relationships.
Our mission is simple: to connect the world’s finest natural gemstones with customers who truly value authenticity, ethics, and lasting worth. Every gemstone we offer is carefully selected, responsibly sourced, and evaluated for its natural beauty and provenance. We believe a gemstone is more than a product it is a story formed over millions of years and meant to be cherished for generations.
By operating directly from Sri Lanka and Australia, we bridge origin and global markets, ensuring fair practices, honest pricing, and complete confidence for our customers. Whether you are a collector, jeweller, or first-time buyer, our promise is to deliver gemstones you can trust today and in the future.
Thank you for being part of our journey and for valuing the true essence of natural gemstones.
Warm regards,
Geeshan Madushanka & Gimhan Danushka
Certification & Authenticity
We are a legally registered company under Sri Lankan law as well as Australian regulations. We are a certified gemstone exporter registered with the National Gem & Jewellery Authority (NGJA) of Sri Lanka and a certified jewellery manufacturer.
Every gemstone we supply is 100% natural and is accompanied by a recognized laboratory certificate confirming its authenticity and specifications.
If you require a certificate from a specific laboratory (such as GIA, GRS, IGI, or any other internationally recognised gemological institute), we are pleased to arrange this according to your requirements.
Our commitment is to provide transparent sourcing, certified quality, and complete confidence with every gemstone we deliver.
Gimhan Danushka Hettiarachchi holds a Bachelor’s Degree in Accountancy and Finance (Special) from the University of Wayamba, Sri Lanka.
With a strong background in finance and business strategy, he oversees governance, planning, and sustainable growth, ensuring that ethical craftsmanship is supported by sound business practices.