Logo
TH | EN

Knowledge & News

Agreement for the Delivery of Property for Consideration of Sale | Free Download! TGJTA Standard Form for Safe Gem Trading

Agreement for the Delivery of Property for Consideration of Sale | Free Download! TGJTA Standard Form for Safe Gem Trading

Stay worry-free! Download the official “Agreement for the Delivery of Property for Consideration of Sale” by TGJTA—legally binding, preventing misappropriation, and ensuring safety in every transaction.

Read More
Enjoy TAX FREE Benefits as a member of TGJTA or GJPCT

Enjoy TAX FREE Benefits as a member of TGJTA or GJPCT

Unlock exclusive tax benefits with membership in TGJTA or GJPCT. Enjoy Duty-Free import of all gems and jewelry (HS Code 71), Zero VAT for trade and re-export among members, and exemption from Personal Income Tax and VAT on rough gemstones. These tax ince

Read More
The Gemports: Revolutionizing Colored Gemstone Trading

The Gemports: Revolutionizing Colored Gemstone Trading

The Gemports: The Colored Gemstone Reference Price Guide Global Launch

Read More
ข่าวประชาสัมพันธ์ GEMPORTS

ข่าวประชาสัมพันธ์ GEMPORTS

ในไตรมาสที่ 3 ปี 2025 ตลาดประสบกับภาวะขาดแคลน ทับทิมคุณภาพสูง* ในเกือบทุกกลุ่ม การลดลงโดยรวมของดัชนี GTI ทับทิมนั้น เกิดขึ้นหลักๆ จากสัดส่วนการซื้อขายทับทิมขนาดใหญ่ (3 กะรัตขึ้นไป) ที่ลดลง รวมถึง ไพลินคุณภาพสูง* โดยเฉพาะที่มีน้ำหนักมากกว่า 5 กะรัต เริ่มหา

Read More
Conch Pearl: The Rare Pink Gem of the Caribbean

Conch Pearl: The Rare Pink Gem of the Caribbean

In the world of precious gemstones, there lies a hidden treasure that originates not from beneath the earth, but from the depths of the sea within a conch shell.

Read More
The Art of 'Modern Heirloom': Bridging Classic and Modern to Elevate Thai Jewelry to the Global Stage

The Art of 'Modern Heirloom': Bridging Classic and Modern to Elevate Thai Jewelry to the Global Stage

In the world of luxury goods, the word "Classic" used to represent safety and sustainability, while "Modern" implied something whimsical and fleeting. However, in this new decade, those rules have been shattered.

Read More
Unveiling the World of Opals: The Gem of Light and Secrets from the Depths

Unveiling the World of Opals: The Gem of Light and Secrets from the Depths

When we speak of "Opals," many immediately picture a white gemstone shimmering with a beautiful rainbow iridescence. But did you know that beneath that beauty lies a hidden historical record of our planet? An opal is not merely a beautiful stone; it is a

Read More
Visual Inspection Tips |

Visual Inspection Tips | "Karat Gold" vs. "Fake Gold"

Understanding the different types of gold is crucial for making confident purchases and investments. TGJTA offers essential tips on how to distinguish between them with the naked eye to prevent purchasing substandard products.

Read More
Cremation Diamonds | A Memorial Innovation or a Marketing Strategy Preying on Grief?

Cremation Diamonds | A Memorial Innovation or a Marketing Strategy Preying on Grief?

Global Claims Associates has discovered "4 Concerning Facts" that consumers should carefully consider before investing a substantial amount of money.

Read More
Essential Basic Gemological Analysis Tools for Traders and Consumers

Essential Basic Gemological Analysis Tools for Traders and Consumers

In the world of gems and jewelry, the ability to classify and evaluate gemstone quality is the heart of the business. Whether you are an entrepreneur selecting stock for your shop or a consumer looking for a special piece of jewelry, having a basic unders

Read More
Gemports Ruby & Sapphire Reference Chart

Gemports Ruby & Sapphire Reference Chart

In an era of valuing transparency, Gemports Colored Gemstone Report emerges as a trusted  beacon,  reflecting a commitment to ethical practices,  fair trade,  and the  overall enhancement of the industry's reputation.

Read More
COLOR GEM PROFESSIONAL (CGP) | Gubelin Academy x TGJTA 

COLOR GEM PROFESSIONAL (CGP) | Gubelin Academy x TGJTA 

THE GLOBAL GEM STANDARD, NOW IN BANGKOK!  ELEVATING THAILAND'S GEM KNOWLEDGE.

Read More
© 2021 TGJTA All Rights Reserved.