HPHT

HPHT diamonds (High Pressure, High Temperature) are laboratory-grown diamonds created under extreme pressure and temperature conditions — replicating the natural environment where diamonds form deep within the Earth. This method faithfully reproduces the natural crystallization of carbon, resulting in stones that share the same chemical, physical, and optical properties as their mined counterparts.

HPHT diamonds exhibit exceptional hardness (10 on the Mohs scale), adamantine luster, and captivating light performance — brilliance, fire, and scintillation — comparable to that of natural diamonds. Once cut and polished, they appear virtually identical to mined diamonds when viewed with the unaided eye.

However, their laboratory origin can be detected through advanced gemological instrumentation. HPHT diamonds may exhibit specific growth features — such as metallic inclusions (catalyst remnants), color zoning, or distinctive UV fluorescence. These internal characteristics do not affect the appearance of the stone but enable precise identification by experts.

HPHT diamonds offer a high-tech, ethical, and cost-effective alternative to mined diamonds. Thanks to their balance of quality, value, and sustainable production, they are increasingly embraced by the fine jewelry industry — and by those who appreciate beauty, innovation, and conscious living.

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29 items found
HPHT Cushion, 6.80 mm * 6.80 mm, Fancy Vivid Yellow / VS+
912.64 $
HPHT Cushion, 6.20 mm * 6.14 mm, Fancy Vivid Yellow / VS+
637.36 $
HPHT Cushion, 5.50 mm * 5.50 mm, Fancy Vivid Yellow / VS+
402.30 $
hpht Round, 6.40 mm, F+ / VS+
131.84 $
HPHT Trilliant, 6.00 mm * 6.00 mm, E+ / VS+
217.24 $
HPHT Shield, 7.65*5.05*3.25 mm, E+ / VS+
158.74 $
HPHT Trilliant, 5.50 mm * 5.50 mm, E+ / VS+
152.87 $
HPHT Pear, 7.00 mm * 4.50 mm, E+ / VS+
152.41 $
HPHT Shield, 6.85*4*60 mm, E+ / VS+
116.03 $
HPHT Trilliant, 5.00 mm * 5.00 mm, E+ / VS+
122.99 $
HPHT Pear, 6.00 mm * 4.00 mm, E+ / VS+
83.33 $
HPHT Shield, 5.17*3.55*3.00 mm, E+ / VS+
67.82 $
HPHT Trilliant, 4.50 mm * 4.50 mm, E+ / VS+
85.06 $
HPHT Round, 4.10 mm, F+ / VS+
31.62 $
HPHT Taper Baguette, 5.00 mm * 3.15 mm, E+ / VS+
57.93 $
HPHT Round, 3.80 mm, F+ / VS+
22.15 $
HPHT Trilliant, 4.00 mm * 4.00 mm, E+ / VS+
51.15 $
HPHT Round, 3.00 mm, F+ / VS+
9.83 $
HPHT Round, 2.80 mm, F+ / VS+
8.22 $
HPHT Round, 2.70 mm, F+ / VS+
7.24 $
HPHT Round, 2.00 mm, F+ / VS+
3.03 $
HPHT Round, 1.70 mm, F+ / VS+
2.62 $
HPHT Round, 1.50 mm, F+ / VS+
2.03 $
HPHT Round, 1.40 mm, F+ / VS+
1.52 $
HPHT Round, 1.30 mm, F+ / VS+
1.29 $
HPHT Round, 1.20 mm, F+ / VS+
1.33 $
HPHT Round, 1.10 mm, F+ / VS+
1.33 $
HPHT Round, 1.00 mm, F+ / VS+
1.62 $
HPHT Round, 0.90 mm, F+ / VS+
1.10 $