Diamond Ring Price by Carat in Thailand (2026)
ZILVY diamond ring starting prices by carat, 0.3ct from 21,000 THB to 1ct from 179,000 THB, natural vs lab-grown. Updated 19 Oct 2026.
In this article
How Much Does a Diamond Ring Cost, Carat by Carat?
Diamond ring prices at ZILVY start at about 21,000 THB for a natural 0.3ct stone and climb to about 179,000 THB at 1ct. Lab-grown starts around 8,000 THB at 0.3ct. Every figure is a starting price, updated 19 October 2026.
This page gathers starting prices by carat in one place so you can set a budget fast. For deeper detail on a specific size there are separate guides for 0.5 carat and 1 carat rings. For a total quote with your preferred setting, message LINE @zilvy.
What Do 0.3 to 0.7 Carat Diamond Rings Start At?
The 0.3-0.7ct range is the most popular for engagement and gift rings. This table shows starting prices for a single-stone ring in Sterling Silver 925 by diamond size.
| Carat | Natural diamond ring | Lab-grown ring |
|---|---|---|
| 0.30ct | From 21,000 THB | From 8,000 THB |
| 0.40ct | From 29,000 THB | From 9,000 THB |
| 0.50ct | From 39,000 THB | From 11,000 THB |
| 0.70ct | From 59,000 THB | From 12,000 THB |
How Do 0.8 to 1 Carat Diamond Ring Prices Compare?
Approaching 1 carat, natural diamond prices jump faster than the weight gain, because 1ct is the "magic size" people search for most. This table shows starting prices for natural D color and D/VVS lab-grown stones.
If you want a size near 1ct for less, a 0.9ct stone looks almost identical to 1.0ct to the naked eye, yet starts at 159,000 THB against 179,000 THB.
| Carat | Natural, D color | Lab-grown, D/VVS |
|---|---|---|
| 0.80ct | From 99,000 THB | From 13,000 THB |
| 0.90ct | From 159,000 THB | From 14,000 THB |
| 1.00ct | From 179,000 THB | From 15,000 THB |
Why Do Natural and Lab-Grown Diamond Rings Cost So Differently?
From the tables above, a 1ct D/VVS lab-grown diamond starts around 15,000 THB against about 179,000 THB for natural D color. The gap comes from production cost and rarity, not 4C quality, since a lab-grown diamond is chemically identical to a mined one and differs only in origin.
Buyers who value rarity and resale value tend to choose natural; buyers who want the largest stone their budget allows tend to choose lab-grown. See our lab-grown diamonds guide for more.
How Does the Setting Change a Diamond Ring Price?
Beyond stone size and type, the setting metal affects the ring price. Sterling Silver 925 is the most economical, rising through 9K, 14K, 18K gold and platinum in that order, reflecting each metal's cost. See our 9K vs 14K vs 18K vs platinum guide for the comparison.
Design adds cost too: a setting with side stones or more prongs runs higher than a plain single-stone setting. Message LINE @zilvy for a total quote on your preferred setting.
FAQ
How much does a diamond ring cost?
At ZILVY, natural diamond rings start around 21,000 THB at 0.3ct up to about 179,000 THB at 1ct, while lab-grown starts around 8,000 THB to 15,000 THB. Message LINE @zilvy for a total quote with your setting.
What does a natural 0.5 carat diamond ring start at?
A natural 0.5ct diamond ring starts around 39,000 THB and a lab-grown one around 11,000 THB. See our 0.5 carat guide for the full breakdown.
What does a 1 carat diamond ring start at?
A natural 1ct D color diamond starts around 179,000 THB, and a D/VVS lab-grown stone starts around 15,000 THB.
Is a lab-grown diamond a real diamond, and why is it cheaper?
Yes. It is grown from carbon in a lab and is chemically identical to a natural diamond. It costs less because production cost and rarity differ, not because quality is lower.
Do diamond rings come with a certificate?
Yes. ZILVY natural diamonds ship with a GIA report and lab-grown stones with an IGI report, on stones from 0.30ct. You can verify the report number online free before buying.
How long does it take to make a diamond ring?
Pay in full when the order is confirmed and production begins at our Bangkok workshop, taking about 5-10 working days. Message LINE @zilvy first to discuss design and budget.