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Kasun Madivila > Services > Consultations

Expert Gemstone Consultation by Dr. Kasun G. Madivila

DBA (USA), GG, AJP (GIA)
Founder | Gemologist | Educator | Researcher | Energy Practitioner | Rare Gem Collector | Sustainability Advocate

Dr. Kasun G. Madivila is a renowned gemologist, educator, and founder of TGL Gem Lab. With expertise in gemstone research and sustainability, he leads Sri Lanka’s gemological advancement. As Editor-in-Chief of Tourmaline Lanka Gem Magazine, he champions scientific innovation and ethical practices in the gem industry, both locally and globally.

Services Offered

Buying & Selling Advisory

  • Expert guidance for local and international gemstone acquisition.
  • Strategic negotiation support in Sri Lankan gems: sapphires, rubies, emeralds, pearls, and rare stones.

Valuation Services

  • Accurate appraisals based on weight, color, clarity, origin, and current market trends.
  • Tailored evaluations for insurance, estate, or resale purposes.

Color, Diamond & Pearl Grading

  • Precise color grading using international GIA standards.
  • Expert diamond grading (cut, clarity, color, carat) and pearl quality assessments.

Rare & Collector Gemstones

  • Sourcing and authentication of exceptional stones like cat’s-eye xenotime and other rare gems.
  • Organization of specialized viewings for collectors and investors.

International Market Insights

  • Accompanied visits to top gem marts in Bangkok, Hong Kong, and other global hubs.
  • Market trend analysis and investment counselling.

Education & Career Mentoring

  • Guidance on internationally relevant gemological education and UGC-approved graduate programs.
  • Coaching for job placement in gem labs, jewellery firms, auction houses, and trade networks.

Personalized Consultancy

  • One-on-one, customized sessions tailored to the client’s needs.
  • Ideal for high-net-worth individuals, gem dealers, collectors, and investors.
  • “We provide certified color grading accompanied by interactive 3D gemstone images. Our 3D photos accurately showcase the stone’s color and clarity, helping buyers make informed decisions—whether buying online or by viewing pictures.”

Why Choose Expert Guidance

  • Unmatched Credentials: GIA‑trained gemologist, former NGJA valuer, and certified national tourist guide.
  • Holistic Expertise: Combines lab-level color and clarity grading with seasoned field and market experience.
  • Ethical & Transparent Approach: Hails from a tradition of accuracy, fairness, and ethical sourcing.
  • Global Perspective: Extensive knowledge of both Sri Lankan and international gem markets.
  • Educational Influence: Visiting lecturer at universities, training institutes, and global seminars.

Consulate-Level Concierge Service

Tailored for embassies, high-end clientele, and diplomatic contexts, this service includes:

  • Complete Gem Procurement Support — from sourcing through certification and logistics.
  • Secure Valuation & Certification — performed at TGL Gem Lab under Kasun's supervision, aligning with consular needs.
  • Customized Museum or Collector Tours — privileged access to gem markets and workshops.
  • Diplomatic Briefings & Documentation — with professional evaluations and provenance reports.

Our Services

Have any Questions? Call us Today!

වාග් විභුෂණ කිර්ති  ශ්‍රී  දේශ  බන්දු  ලංකා පුත්‍ර 

Dr. KASUN G. MADIVILA
GG, AJP (GIA)

Graduate Gemologist 
TGL-Group | Founder
Gemological Institute of America (GIA)
National Tourist Guide Lecturer
Gem Market, Patte Kade,
China Fort, BERUWALA, SRI LANKA.
Rathnapura * Galle * China 
Call: +94 34 2277511
Mobile: +94 766 343430

Our Services

Have any Questions? Call us Today!

වාග් විභුෂණ කිර්ති  ශ්‍රී  දේශ  බන්දු  ලංකා පුත්‍ර 

Dr. KASUN G. MADIVILA
GG, AJP (GIA)

Graduate Gemologist 
TGL-Group | Founder
Gemological Institute of America (GIA)
National Tourist Guide Lecturer
Gem Market, Patte Kade,
China Fort, BERUWALA, SRI LANKA.
Rathnapura * Galle * China 
Call: +94 34 2277511
Mobile: +94 766 343430