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    Loose 1 Carat Diamonds

    One-carat diamonds represent a significant milestone in fine gem acquisition, combining substantial visual impact with enduring investment value. Our carefully curated collection features GIA certified 1.0 ct stones of remarkable clarity and precision cutting, each conflict-free diamond personally selected from Antwerp's finest offerings to ensure exceptional light performance and distinctive character worthy of heirloom status.

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    Fancy color

    Fancy color

    Fancy colored diamonds are incredibly rare and fascinating. Nearly every color you can think of is available in fancy color diamonds. There are a huge variety of beautiful color options. Pink, blue, green, brown diamonds look charming and mesmerizing.

    LEARN ABOUT DIAMOND FANCY COLOR
    Intensity

    Intensity

    Diamond intensity refers to the strength or saturation of a fancy color diamond’s hue. It’s a key factor in determining a diamond’s value and desirability.

    LEARN MORE ABOUT Intensity
    Overtone

    Overtone

    Diamond overtone is a subtle, secondary color that can be observed in some fancy color diamonds, particularly those with intense or vivid hues. It’s like a whisper of color layered over the primary color, adding depth and complexity to the diamond’s brilliance.

    LEARN MORE ABOUT Overtone
    Shape

    Shape

    Diamond shape refers to the overall outline and facets of a diamond. It’s a crucial factor that affects a diamond’s brilliance, fire, and scintillation – its ability to reflect light and sparkle.

    LEARN MORE ABOUT Shape
    Clarity

    Clarity

    Diamond clarity refers to the absence of inclusions (internal flaws) and blemishes (external imperfections) within a diamond. It’s one of the four Cs (carat, cut, clarity, and color) that determine a diamond’s value and price.

    LEARN MORE ABOUT Clarity
    Carat weight

    Carat weight

    Diamond weight, also known as carat weight, is a measure of a diamond’s mass. It’s one of the four Cs (carat, cut, clarity, and color) that determine a diamond’s value and price.

    LEARN MORE ABOUT DIAMOND CARAT
    Price

    Price

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    1.02 Ct Fancy Yellow-Green Heart Modified Brilliant Natural Diamond

    1.02 Ct Fancy Yellow-Green Heart Modified Brilliant Natural Diamond

    40,000.00$
    1.02 Ct Fancy Vivid Yellow Round Brilliant Natural Diamond GIA

    1.02 Ct Fancy Vivid Yellow Round Brilliant Natural Diamond GIA

    6,500.00$
    1.00 Ct Fancy Vivid Orangy Yellow Round Brilliant Natural Diamond GIA

    1.00 Ct Fancy Vivid Orangy Yellow Round Brilliant Natural Diamond GIA

    9,000.00$
    1.02 Ct Fancy Intense Yellow-Orange Cut-Cornered Modified Brilliant Natural Diamond GIA

    1.02 Ct Fancy Intense Yellow-Orange Cut-Cornered Modified Brilliant Natural Diamond GIA

    10,000.00$
    0.81 Carat Fancy Deep Yellow Cushion Modified Brilliant Natural Diamond GIA

    0.81 Carat Fancy Deep Yellow Cushion Modified Brilliant Natural Diamond GIA

    2,500.00$
    1.02 Carat O-P Cushion Shape SI1 Diamond GIA

    1.02 Carat O-P Cushion Shape SI1 Diamond GIA

    1,650.00$
    1.01 Carat U-V Cushion Shape SI1 Diamond GIA

    1.01 Carat U-V Cushion Shape SI1 Diamond GIA

    1,700.00$
    1.01 Carat Fancy Yellow Cushion Shape I1 Diamond GIA

    1.01 Carat Fancy Yellow Cushion Shape I1 Diamond GIA

    2,100.00$
    1.02 Carat S-T Cushion Shape I2 Diamond GIA

    1.02 Carat S-T Cushion Shape I2 Diamond GIA

    1,550.00$
    1.01 Carat Y-Z Cushion Shape I2 Diamond GIA

    1.01 Carat Y-Z Cushion Shape I2 Diamond GIA

    1,700.00$
    1.00 Carat W-X I1 Radiant Shape Diamond

    1.00 Carat W-X I1 Radiant Shape Diamond

    2,000.00$
    1.01 Carat Fancy Intense Yellow VS2 Heart Shape Diamond GIA

    1.01 Carat Fancy Intense Yellow VS2 Heart Shape Diamond GIA

    7,200.00$
    1.03 Carat Fancy Deep Yellow-Orange Round Shape Diamond GIA

    1.03 Carat Fancy Deep Yellow-Orange Round Shape Diamond GIA

    5,500.00$
    1.02 Carat Fancy Vivid Yellow IF Marquise Shape Diamond GIA

    1.02 Carat Fancy Vivid Yellow IF Marquise Shape Diamond GIA

    18,000.00$
    1.04 carat D VVS2 Marquise Shape Diamond GIA

    1.04 carat D VVS2 Marquise Shape Diamond GIA

    7,200.00$
    1.37 and 1.53 carat Pair of F / G SI1 Shield Shape Diamonds

    1.37 and 1.53 carat Pair of F / G SI1 Shield Shape Diamonds

    19,500.00$
    1.01 carat Fancy Deep Brownish Greenish Yellow SI1 Round Shape Diamond GIA

    1.01 carat Fancy Deep Brownish Greenish Yellow SI1 Round Shape Diamond GIA

    5,950.00$
    1.49 carat Fancy Deep Orangy Yellow VS1 Oval Shape Diamond GIA

    1.49 carat Fancy Deep Orangy Yellow VS1 Oval Shape Diamond GIA

    7,077.00$
    1.12 carat Fancy Light Yellow VS1 Oval Shape Diamond GIA

    1.12 carat Fancy Light Yellow VS1 Oval Shape Diamond GIA

    3,980.00$
    1.0 and 1.01 carat Pair J VVS2 Round Shape Diamonds GIA

    1.0 and 1.01 carat Pair J VVS2 Round Shape Diamonds GIA

    Original price was: 8,671.00$.Current price is: 5,500.00$.
    1.01 carat W-X I1 Round Shape Diamond GIA 2

    1.01 carat W-X I1 Round Shape Diamond GIA 2

    1,955.00$
    1.01 carat W-X I1 Round Shape Diamond GIA

    1.01 carat W-X I1 Round Shape Diamond GIA

    1,955.00$
    1.06 carat Light Yellow Y-Z SI2 Round Shape Diamond GIA

    1.06 carat Light Yellow Y-Z SI2 Round Shape Diamond GIA

    2,070.00$
    1.00 carat J VS2 Round Shape Diamond GIA

    1.00 carat J VS2 Round Shape Diamond GIA

    4,025.00$
    1.00 carat Fancy Deep Brownish Greenish Yellow Heart Shape Diamond GIA

    1.00 carat Fancy Deep Brownish Greenish Yellow Heart Shape Diamond GIA

    3,335.00$
    1.12 carat Fancy Deep Yellow Cushion Shape Diamond GIA

    1.12 carat Fancy Deep Yellow Cushion Shape Diamond GIA

    4,485.00$
    1.03 carat Fancy Deep Yellowish Orange I1 Heart Shape Diamond GIA

    1.03 carat Fancy Deep Yellowish Orange I1 Heart Shape Diamond GIA

    9,430.00$
    1.00 carat Fancy Deep Brownish Yellowish Orange I1 Emerald Shape Diamond GIA

    1.00 carat Fancy Deep Brownish Yellowish Orange I1 Emerald Shape Diamond GIA

    9,000.00$
    1.06 carat K VS1 Cushion Shape Diamond GIA

    1.06 carat K VS1 Cushion Shape Diamond GIA

    2,933.00$
    1.02 carat Fancy Dark Green-Grey SI2 Radiant Shape Diamond GIA

    1.02 carat Fancy Dark Green-Grey SI2 Radiant Shape Diamond GIA

    20,700.00$
    1.05 carat Light Yellow (Y-Z) VS1 Radiant Shape Diamond GIA

    1.05 carat Light Yellow (Y-Z) VS1 Radiant Shape Diamond GIA

    2,703.00$
    1.04 carat Light Yellow (U-V) VS2 Radiant Shape Diamond GIA

    1.04 carat Light Yellow (U-V) VS2 Radiant Shape Diamond GIA

    2,185.00$
    1.00 carat Fancy Light Yellow VS1 Pear Shape Diamond GIA

    1.00 carat Fancy Light Yellow VS1 Pear Shape Diamond GIA

    3,220.00$
    1.01 carat Fancy Deep Brown Yellow I2 Heart Shape Diamond GIA

    1.01 carat Fancy Deep Brown Yellow I2 Heart Shape Diamond GIA

    3,623.00$
    1.07 carat Faint Pink SI2 Round Shape Diamond GIA

    1.07 carat Faint Pink SI2 Round Shape Diamond GIA

    Item Upon Request
    1.01 and 1.13 carat Pair of Fancy Intense Yellow VS1 / VS2 Studs Round Shape Diamonds GIA

    1.01 and 1.13 carat Pair of Fancy Intense Yellow VS1 / VS2 Studs Round Shape Diamonds GIA

    Item Upon Request
    1.09 Fancy Light Pink VS1 Radiant Shape GIA

    1.09 Fancy Light Pink VS1 Radiant Shape GIA

    Item Upon Request
    1.02 carat Fancy Vivid Yellow IF Emerald Shape Diamond GIA

    1.02 carat Fancy Vivid Yellow IF Emerald Shape Diamond GIA

    Item Upon Request
    1.01 carat Fancy Deep Yellow SI2 Radiant Shape Diamond GIA

    1.01 carat Fancy Deep Yellow SI2 Radiant Shape Diamond GIA

    Item Upon Request
    0.80 carat G VS2 Marquise Shape Diamond GIA

    0.80 carat G VS2 Marquise Shape Diamond GIA

    Item Upon Request
    1.00 carat D VVS1 Pear Shape Diamond GIA

    1.00 carat D VVS1 Pear Shape Diamond GIA

    Item Upon Request
    1.05 carat D VS2 Marquise Shape Diamond GIA

    1.05 carat D VS2 Marquise Shape Diamond GIA

    Item Upon Request
    1.00 carat L SI1 Pear Shape Diamond GIA

    1.00 carat L SI1 Pear Shape Diamond GIA

    Item Upon Request
    1.00 carat D VVS1 Oval Shape Diamond GIA

    1.00 carat D VVS1 Oval Shape Diamond GIA

    Item Upon Request
    1.00 carat L SI1 Pear Shape Diamond GIA

    1.00 carat L SI1 Pear Shape Diamond GIA

    Item Upon Request
    1.01 carat D VVS2 Radiant Shape Diamond GIA

    1.01 carat D VVS2 Radiant Shape Diamond GIA

    Item Upon Request
    1.02 carat L VS1 Pear Shape Diamond GIA

    1.02 carat L VS1 Pear Shape Diamond GIA

    Item Upon Request
    1.03 carat E VS2 Radiant Shape Diamond GIA

    1.03 carat E VS2 Radiant Shape Diamond GIA

    Item Upon Request

    Frequently Asked Questions

    Why is the one-carat threshold so significant in diamond valuation? 

    The one-carat threshold represents a psychological and market milestone in diamond valuation. Natural diamonds of this precise weight experience significantly higher demand, becoming a standard benchmark for engagement rings and fine jewelry. This increased demand drives premium pricing, with genuine 1.0 ct stones commanding substantially higher per-carat costs than slightly smaller diamonds due to their symbolic significance and ideal proportions.

    What makes certain cuts more valuable in 1 carat diamonds? 

    In one-carat diamonds, cut quality dramatically influences value due to its impact on perceived size and brilliance. Round brilliant cuts command premium prices for their superior light performance, while fancy shapes like cushion or oval can appear larger than their actual weight. When purchasing a 1.0 carat precious stone, prioritizing excellent cut parameters often delivers greater aesthetic value than investing in higher color or clarity alone.

    How do GIA certified 1 carat diamonds differ from uncertified stones? 

    GIA certified one-carat diamonds offer verified quality specifications and authentic grading from the industry’s most respected authority. Unlike uncertified stones, which may be inconsistently graded, certified 1.0 ct diamonds provide transparent documentation of their exact characteristics. This certification adds significant value to natural conflict-free diamonds, ensuring their worth while protecting buyers from potential misrepresentation of quality or synthetic substitutions.

    What factors most impact the investment value of 1.0 carat diamonds? 

    The investment value of one-carat diamonds is primarily determined by rarity factors including color, clarity, and cut excellence. Stones with exceptional characteristics like D-F color and VVS clarity typically appreciate more consistently over time. For maximum long-term worth, focus on purchasing conflict-free 1.0 ct diamonds with excellent proportions, minimal fluorescence, and comprehensive certification, as these attributes support stronger price retention and potential appreciation.

    We Educate

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    Bringing clarity to the realm of diamonds, gems, and fine jewelry through insight that elevates interest into true expertise.

    What to Do in Antwerp: Culture, Cuisine, and Diamonds
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    What to Do in Antwerp: Culture, Cuisine, and Diamonds

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    Jewelry Trends 2026: Global Luxury Styles, Materials & Colors
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    More About Loose Diamonds at Reuven Veksler

    Understanding Diamond Quality and Certification

    Evaluating loose diamonds requires comprehensive knowledge of the 4Cs and certification standards that determine both aesthetic appeal and investment potential. Cut precision directly impacts light refraction and exceptional brilliance, while color grading reveals the stone’s optical purity on the D-Z scale. Professional gemological evaluation from laboratories like GIA or IGI provides authentication of natural origin, ensuring buyers receive conflict-free diamonds with documented quality characteristics rather than synthetic alternatives.

    Read more +

    Investment Advantages of Loose Diamond Purchasing

    Investment-grade loose diamonds offer significant cost-per-carat advantages over pre-set jewelry, allowing buyers to assess clarity characteristics without setting interference. The loose diamond market provides direct access to collector-grade specimens, eliminating multiple retail intermediaries that typically increase final pricing. When you buy loose diamonds online with proper certification, traceable origins ensure transparency about the stone’s journey from mine to market, protecting your investment through verified provenance documentation.

    Reuven Veksler’s Premium Natural Diamond Collection

    Hand-picked from our exclusive Antwerp vault, Reuven Veksler’s premium collection represents five decades of gemological expertise and artisan craftsmanship. As certified members of the Antwerp Diamond Exchange since 1974, we provide direct access to museum-quality natural diamonds with sustainable sourcing practices and lifetime warranty protection. Our conflict-free stones undergo rigorous evaluation to ensure exceptional brilliance and authentic value, offering bespoke jewelry creation opportunities and superior investment potential for discerning collectors worldwide.

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    Frequently Asked questions

    Why should I buy loose diamonds instead of pre-mounted stones? 

    Buying loose diamonds allows you to examine the stone’s natural characteristics without interference from settings, ensuring you purchase genuine, high-quality specimens. You can verify the diamond’s clarity, color grade, and cut quality independently, often achieving better value and cost efficiency. Loose stones also provide flexibility for custom jewelry creation, where you control both the diamond selection and setting design process.

    What certifications should I look for when purchasing diamonds? 

    GIA certified diamonds represent the gold standard in gemological evaluation, providing detailed analysis of cut, clarity, color, and carat weight. Other reputable certifications include IGI and HRD, particularly for stones originating from Antwerp’s diamond exchanges. These certificates document the diamond’s natural origin, conflict-free status, and authentic characteristics, protecting your investment and ensuring genuine quality.

    What are conflict-free diamonds and why choose them? 

    Conflict-free diamonds are ethically sourced stones that were not mined in areas where proceeds funded armed conflict or human rights abuses. These natural diamonds with clear, traceable origins represent a responsible choice for buyers who want their purchase to reflect their values. At Reuven Veksler, we deal exclusively with conflict-free diamonds that come with proper certifications from reputable laboratories like GIA, ensuring both genuine quality and peace of mind for your investment.

    Where should I buy certified loose diamonds for the best value? 

    When purchasing certified loose diamonds, choose reputable dealers who provide comprehensive documentation and ethical sourcing guarantees. Ensure each stone comes with certification from respected laboratories like GIA, AGS, or IGI to verify authenticity and quality. At Reuven Veksler, we offer conflict-free diamonds with lifetime warranties, complete provenance documentation, and expert guidance to make your diamond buying experience both secure and valuable, whether you’re seeking investment-grade stones or creating bespoke jewelry.

    We Educate

    View more

    Bringing clarity to the realm of diamonds, gems, and fine jewelry through insight that elevates interest into true expertise.

    What to Do in Antwerp: Culture, Cuisine, and Diamonds
    • Lifestyle
    What to Do in Antwerp: Culture, Cuisine, and Diamonds

    Antwerp is a city that reveals itself gradually. It is not loud, not theatrical, and not designed for mass tourism. Instead, it offers depth: centuries of trade and craftsmanship, serious…

    BySarah Veksler
    January 28, 2026
    Jewelry Trends 2026: Global Luxury Styles, Materials & Colors
    • Jewelry
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    The landscape of luxury jewelry is transforming as we move through 2026. After several years dominated by delicate “quiet luxury” pieces, a clear shift is underway toward bolder styles and…

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    January 20, 2026