Loose Diamonds & Gemstones Auctions

1180 Results
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  • Natural 1 ct, Color F/I1 GIA Graded Diamond
    Estimate
    $1,700 - $3,400

    Natural 1 ct, Color F/I1 GIA Graded Diamond

    Est.
    $1,700 - $3,400
    Robinhood Auctions
    0 Bids
    Starting Bid
    $1,700
  • Lab Grown 1.51 ct, Color D/VS1 GIA Graded Diamond
    Estimate
    $650 - $1,300

    Lab Grown 1.51 ct, Color D/VS1 GIA Graded Diamond

    Est.
    $650 - $1,300
    Robinhood Auctions
    0 Bids
    Starting Bid
    $650
  • Lab Grown 3.01 ct, Color E/VS2 GIA Graded Diamond
    Estimate
    $1,200 - $2,400

    Lab Grown 3.01 ct, Color E/VS2 GIA Graded Diamond

    Est.
    $1,200 - $2,400
    Robinhood Auctions
    0 Bids
    Starting Bid
    $1,200
  • Natural 1.5 ct, Color K/VS1 GIA Graded Diamond
    Estimate
    $4,200 - $8,400

    Natural 1.5 ct, Color K/VS1 GIA Graded Diamond

    Est.
    $4,200 - $8,400
    Robinhood Auctions
    0 Bids
    Starting Bid
    $4,200
  • Natural 1 ct, Color F/VS1 GIA Graded Diamond
    Estimate
    $2,600 - $5,200

    Natural 1 ct, Color F/VS1 GIA Graded Diamond

    Est.
    $2,600 - $5,200
    Robinhood Auctions
    0 Bids
    Starting Bid
    $2,600
  • Natural 1.01 ct, Color D/SI2 GIA Graded Diamond
    Estimate
    $2,600 - $5,200

    Natural 1.01 ct, Color D/SI2 GIA Graded Diamond

    Est.
    $2,600 - $5,200
    Robinhood Auctions
    0 Bids
    Starting Bid
    $2,600
  • Lab Grown 1.06 ct, Color F/VS1 GIA Graded Diamond
    Estimate
    $300 - $600

    Lab Grown 1.06 ct, Color F/VS1 GIA Graded Diamond

    Est.
    $300 - $600
    Robinhood Auctions
    0 Bids
    Starting Bid
    $300
  • Lab Grown 1.13 ct, Color F/VVS1 GIA Graded Diamond
    Estimate
    $420 - $840

    Lab Grown 1.13 ct, Color F/VVS1 GIA Graded Diamond

    Est.
    $420 - $840
    Robinhood Auctions
    0 Bids
    Starting Bid
    $420
  • Lab Grown 4.07 ct, Color F/VS1 GIA Graded Diamond
    Estimate
    $2,200 - $4,400

    Lab Grown 4.07 ct, Color F/VS1 GIA Graded Diamond

    Est.
    $2,200 - $4,400
    Robinhood Auctions
    0 Bids
    Starting Bid
    $2,200
  • Lab Grown 1.09 ct, Color G/VVS2 GIA Graded Diamond
    Estimate
    $300 - $600

    Lab Grown 1.09 ct, Color G/VVS2 GIA Graded Diamond

    Est.
    $300 - $600
    Robinhood Auctions
    0 Bids
    Starting Bid
    $300
  • Lab Grown 5.01 ct, Color F/VS1 GIA Graded Diamond
    Estimate
    $3,000 - $6,000

    Lab Grown 5.01 ct, Color F/VS1 GIA Graded Diamond

    Est.
    $3,000 - $6,000
    Robinhood Auctions
    0 Bids
    Starting Bid
    $3,000
  • Natural 0.52 ct, Color D/VS2 GIA Graded Diamond
    Estimate
    $1,100 - $2,200

    Natural 0.52 ct, Color D/VS2 GIA Graded Diamond

    Est.
    $1,100 - $2,200
    Robinhood Auctions
    0 Bids
    Starting Bid
    $1,100
  • Lab Grown 5.02 ct, Color F/VS1 GIA Graded Diamond
    Estimate
    $2,600 - $5,200

    Lab Grown 5.02 ct, Color F/VS1 GIA Graded Diamond

    Est.
    $2,600 - $5,200
    Robinhood Auctions
    0 Bids
    Starting Bid
    $2,600
  • Lab Grown 2.6 ct, Color FANCY INTENSE PINK/VS1 GIA Graded Diamond
    Estimate
    $1,800 - $3,600

    Lab Grown 2.6 ct, Color FANCY INTENSE PINK/VS1 GIA Grad...

    Est.
    $1,800 - $3,600
    Robinhood Auctions
    0 Bids
    Starting Bid
    $1,800
  • Lab Grown 3.66 ct, Color E/VS1 GIA Graded Diamond
    Estimate
    $1,800 - $3,600

    Lab Grown 3.66 ct, Color E/VS1 GIA Graded Diamond

    Est.
    $1,800 - $3,600
    Robinhood Auctions
    0 Bids
    Starting Bid
    $1,800
  • Lab Grown 1.04 ct, Color F/VVS2 GIA Graded Diamond
    Estimate
    $330 - $660

    Lab Grown 1.04 ct, Color F/VVS2 GIA Graded Diamond

    Est.
    $330 - $660
    Robinhood Auctions
    0 Bids
    Starting Bid
    $330
  • Lab Grown 1.1 ct, Color G/VVS2 GIA Graded Diamond
    Estimate
    $300 - $600

    Lab Grown 1.1 ct, Color G/VVS2 GIA Graded Diamond

    Est.
    $300 - $600
    Robinhood Auctions
    0 Bids
    Starting Bid
    $300
  • Lab Grown 3.14 ct, Color F/VS1 GIA Graded Diamond
    Estimate
    $1,200 - $2,400

    Lab Grown 3.14 ct, Color F/VS1 GIA Graded Diamond

    Est.
    $1,200 - $2,400
    Robinhood Auctions
    0 Bids
    Starting Bid
    $1,200
  • Lab Grown 2.05 ct, Color E/VS1 GIA Graded Diamond
    Estimate
    $800 - $1,600

    Lab Grown 2.05 ct, Color E/VS1 GIA Graded Diamond

    Est.
    $800 - $1,600
    Robinhood Auctions
    0 Bids
    Starting Bid
    $800
  • Natural 0.51 ct, Color D/VS2 GIA Graded Diamond
    Estimate
    $800 - $1,600

    Natural 0.51 ct, Color D/VS2 GIA Graded Diamond

    Est.
    $800 - $1,600
    Robinhood Auctions
    0 Bids
    Starting Bid
    $800
  • Natural 1.5 ct, Color L/VS1 GIA Graded Diamond
    Estimate
    $4,500 - $9,000

    Natural 1.5 ct, Color L/VS1 GIA Graded Diamond

    Est.
    $4,500 - $9,000
    Robinhood Auctions
    0 Bids
    Starting Bid
    $4,500
  • Natural 1.5 ct, Color H/SI2 GIA Graded Diamond
    Estimate
    $4,200 - $8,400

    Natural 1.5 ct, Color H/SI2 GIA Graded Diamond

    Est.
    $4,200 - $8,400
    Robinhood Auctions
    0 Bids
    Starting Bid
    $4,200
  • Natural 1.31 ct, Color M/SI2 GIA Graded Diamond
    Estimate
    $2,000 - $4,000

    Natural 1.31 ct, Color M/SI2 GIA Graded Diamond

    Est.
    $2,000 - $4,000
    Robinhood Auctions
    0 Bids
    Starting Bid
    $2,000
  • Lab Grown 2.11 ct, Color F/VS1 GIA Graded Diamond
    Estimate
    $650 - $1,300

    Lab Grown 2.11 ct, Color F/VS1 GIA Graded Diamond

    Est.
    $650 - $1,300
    Robinhood Auctions
    0 Bids
    Starting Bid
    $650
  • 4.60 ct, E/VS1, Princess cut IGI Graded Lab Grown Diamond
    Estimate
    $6,500 - $8,800

    4.60 ct, E/VS1, Princess cut IGI Graded Lab Grown Diamo...

    Est.
    $6,500 - $8,800
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $4,500
  • 1.30 ct, Vivid Blue/VS1, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $1,100 - $1,600

    1.30 ct, Vivid Blue/VS1, Round cut IGI Graded Lab Grown...

    Est.
    $1,100 - $1,600
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $800
  • 4.10 ct, F/VS2, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $3,600 - $4,900

    4.10 ct, F/VS2, Round cut IGI Graded Lab Grown Diamond

    Est.
    $3,600 - $4,900
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,600
  • 3.02 carat diamond pair, Cushion cut Diamonds IGI Graded
    Estimate
    $2,600 - $3,500

    3.02 carat diamond pair, Cushion cut Diamonds IGI Grade...

    Est.
    $2,600 - $3,500
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $1,800
  • 4.02 carat diamond pair, Round cut Diamonds IGI Graded
    Estimate
    $4,400 - $6,000

    4.02 carat diamond pair, Round cut Diamonds IGI Graded

    Est.
    $4,400 - $6,000
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $3,000
  • 2.63 ct, F/VVS2, Sq. Emerald cut IGI Graded Lab Grown Diamond
    Estimate
    $3,000 - $4,200

    2.63 ct, F/VVS2, Sq. Emerald cut IGI Graded Lab Grown D...

    Est.
    $3,000 - $4,200
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,200
  • 3.21 ct, F/VVS2, Round cut GIA Graded Lab Grown Diamond
    Estimate
    $3,800 - $5,200

    3.21 ct, F/VVS2, Round cut GIA Graded Lab Grown Diamond...

    Est.
    $3,800 - $5,200
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,600
  • 10.08 carat diamond pair, Pear cut Diamonds IGI Graded
    Estimate
    $12,600 - $16,900

    10.08 carat diamond pair, Pear cut Diamonds IGI Graded

    Est.
    $12,600 - $16,900
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $8,500
  • 10.20 ct, F/VS1, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $31,700 - $42,400

    10.20 ct, F/VS1, Round cut IGI Graded Lab Grown Diamond...

    Est.
    $31,700 - $42,400
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $22,000
  • 2.38 ct, E/VS1, Emerald cut IGI Graded Lab Grown Diamond
    Estimate
    $1,700 - $2,400

    2.38 ct, E/VS1, Emerald cut IGI Graded Lab Grown Diamon...

    Est.
    $1,700 - $2,400
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $1,200
  • 2.05 ct, Vivid Pink/VVS2, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $3,300 - $4,500

    2.05 ct, Vivid Pink/VVS2, Round cut IGI Graded Lab Grow...

    Est.
    $3,300 - $4,500
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,400
  • 5.03 ct, G/VVS2, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $6,400 - $8,700

    5.03 ct, G/VVS2, Round cut IGI Graded Lab Grown Diamond...

    Est.
    $6,400 - $8,700
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $4,500
  • 5.45 carat diamond pair, Cushion cut Diamonds IGI Graded
    Estimate
    $4,000 - $5,500

    5.45 carat diamond pair, Cushion cut Diamonds IGI Grade...

    Est.
    $4,000 - $5,500
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,800
  • 3.52 ct, E/VS1, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $3,600 - $4,900

    3.52 ct, E/VS1, Round cut IGI Graded Lab Grown Diamond

    Est.
    $3,600 - $4,900
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,600
  • 2.22 carat diamond pair, Pear cut Diamonds IGI Graded
    Estimate
    $2,100 - $3,000

    2.22 carat diamond pair, Pear cut Diamonds IGI Graded

    Est.
    $2,100 - $3,000
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $1,500
  • NO-RESERVE LOT: 2.09 ct, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $1,500 - $2,100

    NO-RESERVE LOT: 2.09 ct, Round cut IGI Graded Lab Grown...

    Est.
    $1,500 - $2,100
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $500
  • 5.01 ct, E/VS2, Round cut IGI Graded Lab Grown Diamond
    Estimate
    $6,500 - $8,800

    5.01 ct, E/VS2, Round cut IGI Graded Lab Grown Diamond

    Est.
    $6,500 - $8,800
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $4,500
  • 3.00 ct, Int. Blue/VS2, Sq. Emerald cut IGI Graded Lab Grown Diamond
    Estimate
    $4,400 - $5,900

    3.00 ct, Int. Blue/VS2, Sq. Emerald cut IGI Graded Lab ...

    Est.
    $4,400 - $5,900
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $3,000
  • 1.64 ct, Int. Pink/VS2, Marquise cut IGI Graded Lab Grown Diamond
    Estimate
    $1,600 - $2,200

    1.64 ct, Int. Pink/VS2, Marquise cut IGI Graded Lab Gro...

    Est.
    $1,600 - $2,200
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $1,100
  • 3.01 ct, G/VVS2, Oval cut GIA Graded Lab Grown Diamond
    Estimate
    $3,100 - $4,300

    3.01 ct, G/VVS2, Oval cut GIA Graded Lab Grown Diamond

    Est.
    $3,100 - $4,300
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,200
  • 3.06 carat diamond pair, Emerald cut Diamonds IGI Graded
    Estimate
    $2,900 - $4,000

    3.06 carat diamond pair, Emerald cut Diamonds IGI Grade...

    Est.
    $2,900 - $4,000
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,000
  • NO-RESERVE LOT: 7.50 ct, Oval cut GIA Graded Lab Grown Diamond
    Estimate
    $27,000 - $36,000

    NO-RESERVE LOT: 7.50 ct, Oval cut GIA Graded Lab Grown ...

    Est.
    $27,000 - $36,000
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $1,000
  • 3.21 ct, E/VVS2, Emerald cut IGI Graded Lab Grown Diamond
    Estimate
    $3,900 - $5,300

    3.21 ct, E/VVS2, Emerald cut IGI Graded Lab Grown Diamo...

    Est.
    $3,900 - $5,300
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $2,800
  • 5.50 ct, F/VS2, Emerald cut IGI Graded Lab Grown Diamond
    Estimate
    $6,100 - $8,300

    5.50 ct, F/VS2, Emerald cut IGI Graded Lab Grown Diamon...

    Est.
    $6,100 - $8,300
    Lab Grown Auctions
    0 Bids
    Starting Bid
    $4,200

Looking as lovely as when set in jewelry, loose diamonds and gemstones offer consumers additional benefits of matching the unmounted stone to desired specifications and quality characteristics to create a truly unique piece of custom jewelry, such as an engagement ring or milestone gift. Indulge yourself in a world of stunning diamond collections to glistening gemstones dating from the 19th to 21st century on Bidsquare, the online auction site providing authentic gemstone diamonds straight to consumers from verified sellers all over the world.

Basics of Loose Diamonds

Loose diamonds are diamonds that have not been set into jewelry like rings or earrings. The rarity and beauty of diamonds are affected by many variables, including Cut, Color, Clarity, and Carat Weight, the 4Cs factors that determine the price of the unmounted stone. Wholesale diamonds are priced by carat, and loose diamond prices grow exponentially with every full carat. Hence, the price difference between 2.9 carat and 3.1 carat diamonds could be hundreds of dollars, if not higher.

Although all 4Cs contribute to a diamond's beauty, cut and clarity have a greater effect on a diamond's stability. A diamond's cut refers to the shape and also the proportions in which the diamond has been cut. Different diamond shapes are reflections of the proportions and quality of the rough diamond as well as popular taste. Some of the most popular shapes of diamonds are the Round, Oval, Emerald, Baguette, Marquise Square, Princess cuts, in addition to the availability of various specialty shapes. Diamonds with pointed tips should be stored and handled carefully. Clarity is determined by the presence or absence of visible flaws in the diamond. A diamond's brilliance can be altered by surface blemishes or internal inclusions, which directly impact its value. The least color diamonds are more valuable, the exceptions are the colored diamonds, especially the pinks.

Loose certified diamonds come with verifiable documentation attesting to the jewel's quality, whether purchased as an investment or for mounting. The price of loose diamonds for sale is 50-70% less than its retail price because of cutting unnecessary costs as with mounted stones. Assessing the quality is easier with loose diamonds due to difficulty in hiding imperfections that would otherwise be easy with mountings.

Quick facts about Loose Diamonds and Gemstones

  • A diamond is not always white in color.
  • The cutting process can cause a diamond to lose up to 50% of its weight.