What are diamond prices like at the beginning of 2026? Are they expensive, and is now a good time to buy or should you wait? Today, we have the answers.

Diamonds are gemstones of enduring value and are consistently in demand. Natural diamonds are formed deep within the Earth and undergo precise cutting and polishing before being set into fine jewelry such as necklaces, rings, bracelets, earrings, pendants, and brooches. Beyond their beauty, diamonds are also suitable for investment—they are easy to buy, easy to resell, and can even be used as collateral, much like gold. Moreover, diamond prices tend to be less volatile than gold.

Diamond Price Update for Early 2026

In 2026, diamond pricing continues to follow the same fundamental criteria: the 4Cs—Carat, Color, Clarity, and Cut. These standards were developed and established by the Gemological Institute of America (GIA).

Carat
Carat refers to the weight of a diamond (also known locally as “tang”). Weight has a direct impact on price—the higher the carat weight, the higher the price.

Color
Colorless diamonds, often referred to as “D color” or “water 100,” command significantly higher prices than diamonds with a light yellow tint. Color affects light performance, brilliance, and overall beauty.

Clarity
Clarity measures internal inclusions and external blemishes. Flawless (FL) and Internally Flawless (IF) diamonds are the highest grades and therefore the most expensive, followed by VVS, VS, and SI grades.

Cut
A perfectly cut diamond is graded Excellent, or Triple Excellent, meaning excellence in cut, symmetry, and polish. This directly affects sparkle and brilliance.

การตรวจสอบราคาเพชร แนะนำให้เช็คจากแหล่งที่มีความน่าเชื่อถือ หรือ อ้างอิงราคาจาก Rapaport Price List ปัจจุบันราคาเพชร 1 กะรัต อยู่ที่ 80,000-600,000+ บาท ขึ้นอยู่กับคุณภาพของเพชร  อย่างที่บอกว่ายิ่งเป็นเพชรเกรดดี คุณภาพสูง สีขาวใสเพชรน้ำ 100 เพชรไร้ตำหนิ ผ่านการเจียระไนมาอย่างเพอร์เฟค (Triple Excellent ) ยิ่งมีราคาสูง 

การซื้อขายเพชรเป็นเรื่องของทั้งศาสตร์และศิลป์ นอกจากราคากลาง Rapaport Price List ที่ใช้อ้างอิงได้แล้ว ยังมีการซื้อขายกันตามอารมณ์หรือความพึงพอใจ รวมถึงเพชรบางเม็ดยังมีส่วนลดต่างๆ เข้ามาเกี่ยวข้อง กล่าวคือเพชรเกรดเดียวกัน บางร้านขายไม่เท่ากัน เช่น บางร้านอาจขายราคาถูกกว่าเพราะมีโปรโมชั่นที่น่าสนใจมากกว่านั่นเอง

Current Diamond Prices in 2026

To evaluate diamond prices, it is recommended to consult reliable sources or reference the Rapaport Price List, which is widely used as an international benchmark.
Currently, the price of a 1-carat diamond ranges from approximately 80,000 to 600,000+ THB, depending on quality.

As expected, diamonds of higher grade—colorless (D color), flawless clarity, and Triple Excellent cut—are priced at the premium end of the spectrum.

Thinking of Buying Diamonds? Choose Phetchompoo Jewelry

If you’re looking for diamonds, there’s no need to hesitate. Petchompoo Jewelry is a trusted, top-tier diamond retailer offering a wide selection of genuine diamond and gemstone jewelry in various designs.

All diamonds come with certification from internationally recognized institutions such as GIA, ensuring authenticity and quality. We offer exquisite jewelry at attainable prices, along with attractive promotions and discounts. Enjoy convenient online ordering with nationwide delivery.

In addition, our team of experts provides professional consultation, custom jewelry design services, and bespoke diamond creations—unique, one-of-a-kind pieces crafted exclusively for you.

Phetchompoo Jewelry—a diamond boutique you can trust, delivering professional, honest, and complete services in every aspect.