Loose Diamonds & Gemstones Auctions

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  • 3.54 ct, I/VVS2, Marquise cut GIA Graded Diamond. Appraised Value: $143,300
    Estimate
    $51,000 - $60,000

    3.54 ct, I/VVS2, Marquise cut GIA Graded Diamond. Appra...

    Est.
    $51,000 - $60,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $38,000
  • 3.03 ct, H/VS2, Radiant cut GIA Graded Diamond. Appraised Value: $122,700
    Estimate
    $42,000 - $49,000

    3.03 ct, H/VS2, Radiant cut GIA Graded Diamond. Apprais...

    Est.
    $42,000 - $49,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $32,000
  • 3.11 ct, D/VS1, Cushion cut GIA Graded Diamond. Appraised Value: $237,100
    Estimate
    $61,000 - $70,000

    3.11 ct, D/VS1, Cushion cut GIA Graded Diamond. Apprais...

    Est.
    $61,000 - $70,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $44,000
  • NO-RESERVE LOT: 1.70 ct, Emerald cut GIA Graded Diamond. Appraised Value: $26,900
    Estimate
    $9,000 - $12,000

    NO-RESERVE LOT: 1.70 ct, Emerald cut GIA Graded Diamond...

    Est.
    $9,000 - $12,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $1,000
  • 2.20 ct, D/VVS1, Emerald cut GIA Graded Diamond. Appraised Value: $116,300
    Estimate
    $46,000 - $54,000

    2.20 ct, D/VVS1, Emerald cut GIA Graded Diamond. Apprai...

    Est.
    $46,000 - $54,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $34,000
  • 3.01 ct, G/VS1, Radiant cut GIA Graded Diamond. Appraised Value: $152,300
    Estimate
    $49,000 - $57,000

    3.01 ct, G/VS1, Radiant cut GIA Graded Diamond. Apprais...

    Est.
    $49,000 - $57,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $36,000
  • 2.01 ct, G/VS1, Radiant cut GIA Graded Diamond. Appraised Value: $70,000
    Estimate
    $19,000 - $23,000

    2.01 ct, G/VS1, Radiant cut GIA Graded Diamond. Apprais...

    Est.
    $19,000 - $23,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $14,000
  • 2.00 ct, D/FL, Round cut GIA Graded Diamond. Appraised Value: $202,500
    Estimate
    $64,000 - $75,000

    2.00 ct, D/FL, Round cut GIA Graded Diamond. Appraised ...

    Est.
    $64,000 - $75,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $48,000
  • NO-RESERVE LOT: 1.50 ct, Round cut GIA Graded Diamond. Appraised Value: $34,100
    Estimate
    $11,000 - $13,000

    NO-RESERVE LOT: 1.50 ct, Round cut GIA Graded Diamond. ...

    Est.
    $11,000 - $13,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $1,000
  • 3.01 ct, E/VVS1, Emerald cut GIA Graded Diamond. Appraised Value: $252,000
    Estimate
    $93,000 - $107,000

    3.01 ct, E/VVS1, Emerald cut GIA Graded Diamond. Apprai...

    Est.
    $93,000 - $107,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $70,000
  • 6.01 carat diamond pair, Round cut Diamonds GIA Graded 1) 3.01 ct, Color G, VVS1 2) 3.00 ct, Color H, VVS1. Appraised Value: $456,100
    Estimate
    $159,000 - $183,000

    6.01 carat diamond pair, Round cut Diamonds GIA Graded ...

    Est.
    $159,000 - $183,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $120,000
  • 5.01 ct, E/VS1, Round cut GIA Graded Diamond. Appraised Value: $895,500
    Estimate
    $228,000 - $261,000

    5.01 ct, E/VS1, Round cut GIA Graded Diamond. Appraised...

    Est.
    $228,000 - $261,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $170,000
  • 2.20 ct, E/VS1, Oval cut GIA Graded Diamond. Appraised Value: $89,100
    Estimate
    $32,000 - $37,000

    2.20 ct, E/VS1, Oval cut GIA Graded Diamond. Appraised ...

    Est.
    $32,000 - $37,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $24,000
  • 2.03 ct, E/VVS2, Emerald cut GIA Graded Diamond. Appraised Value: $89,000
    Estimate
    $28,000 - $33,000

    2.03 ct, E/VVS2, Emerald cut GIA Graded Diamond. Apprai...

    Est.
    $28,000 - $33,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $22,000
  • NO-RESERVE LOT: 1.51 ct, Pear cut GIA Graded Diamond. Appraised Value: $39,800
    Estimate
    $11,000 - $13,000

    NO-RESERVE LOT: 1.51 ct, Pear cut GIA Graded Diamond. A...

    Est.
    $11,000 - $13,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $1,000
  • 2.01 ct, F/VVS1, Emerald cut GIA Graded Diamond. Appraised Value: $85,900
    Estimate
    $25,000 - $30,000

    2.01 ct, F/VVS1, Emerald cut GIA Graded Diamond. Apprai...

    Est.
    $25,000 - $30,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $19,000
  • 3.01 ct, D/VS1, Round cut GIA Graded Diamond. Appraised Value: $301,000
    Estimate
    $70,000 - $81,000

    3.01 ct, D/VS1, Round cut GIA Graded Diamond. Appraised...

    Est.
    $70,000 - $81,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $55,000
  • 10.03 carat diamond pair, Emerald cut Diamonds GIA Graded 1) 5.01 ct, Color H, VS2 2) 5.02 ct, Color H, VS2. Appraised Value: $789,800
    Estimate
    $220,000 - $252,000

    10.03 carat diamond pair, Emerald cut Diamonds GIA Grad...

    Est.
    $220,000 - $252,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $160,000
  • 5.50 ct, E/FL, Round cut GIA Graded Diamond. Appraised Value: $1,493,200
    Estimate
    $413,000 - $473,000

    5.50 ct, E/FL, Round cut GIA Graded Diamond. Appraised ...

    Est.
    $413,000 - $473,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $320,000
  • 4.02 carat diamond pair, Emerald cut Diamonds GIA Graded 1) 2.01 ct, Color H, VVS2 2) 2.01 ct, Color G, VS1. Appraised Value: $131,000
    Estimate
    $42,000 - $49,000

    4.02 carat diamond pair, Emerald cut Diamonds GIA Grade...

    Est.
    $42,000 - $49,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $32,000
  • 6.02 carat diamond pair, Round cut Diamonds GIA Graded 1) 3.01 ct, Color I, VVS2 2) 3.01 ct, Color H, VS1. Appraised Value: $294,500
    Estimate
    $113,000 - $130,000

    6.02 carat diamond pair, Round cut Diamonds GIA Graded ...

    Est.
    $113,000 - $130,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $85,000
  • 2.20 ct, D/VVS2, Pear cut GIA Graded Diamond. Appraised Value: $103,900
    Estimate
    $38,000 - $44,000

    2.20 ct, D/VVS2, Pear cut GIA Graded Diamond. Appraised...

    Est.
    $38,000 - $44,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $28,000
  • 2.01 ct, F/VS1, Emerald cut GIA Graded Diamond. Appraised Value: $76,800
    Estimate
    $24,000 - $28,000

    2.01 ct, F/VS1, Emerald cut GIA Graded Diamond. Apprais...

    Est.
    $24,000 - $28,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $18,000
  • 2.01 ct, D/VS2, Pear cut GIA Graded Diamond. Appraised Value: $79,100
    Estimate
    $28,000 - $33,000

    2.01 ct, D/VS2, Pear cut GIA Graded Diamond. Appraised ...

    Est.
    $28,000 - $33,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $22,000
  • 3.01 ct, D/VS1, Emerald cut GIA Graded Diamond. Appraised Value: $229,500
    Estimate
    $57,000 - $66,000

    3.01 ct, D/VS1, Emerald cut GIA Graded Diamond. Apprais...

    Est.
    $57,000 - $66,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $42,000
  • 6.49 carat diamond pair, Round cut Diamonds GIA Graded 1) 3.18 ct, Color D, FL 2) 3.31 ct, Color E, IF. Appraised Value: $1,015,600
    Estimate
    $334,000 - $383,000

    6.49 carat diamond pair, Round cut Diamonds GIA Graded ...

    Est.
    $334,000 - $383,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $240,000
  • 1.51 ct, I/VVS2, Oval cut GIA Graded Diamond. Appraised Value: $24,800
    Estimate
    $9,000 - $11,000

    1.51 ct, I/VVS2, Oval cut GIA Graded Diamond. Appraised...

    Est.
    $9,000 - $11,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $5,500
  • 2.01 ct, I/VS2, Radiant cut GIA Graded Diamond. Appraised Value: $38,900
    Estimate
    $13,000 - $16,000

    2.01 ct, I/VS2, Radiant cut GIA Graded Diamond. Apprais...

    Est.
    $13,000 - $16,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $10,000
  • 5.02 ct, G/VVS1, Emerald cut GIA Graded Diamond. Appraised Value: $633,700
    Estimate
    $192,000 - $221,000

    5.02 ct, G/VVS1, Emerald cut GIA Graded Diamond. Apprai...

    Est.
    $192,000 - $221,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $140,000
  • 2.03 ct, E/VS2, Round cut GIA Graded Diamond. Appraised Value: $79,900
    Estimate
    $23,000 - $27,000

    2.03 ct, E/VS2, Round cut GIA Graded Diamond. Appraised...

    Est.
    $23,000 - $27,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $17,000
  • 2.01 ct, H/VVS2, Round cut GIA Graded Diamond. Appraised Value: $70,000
    Estimate
    $24,000 - $28,000

    2.01 ct, H/VVS2, Round cut GIA Graded Diamond. Appraise...

    Est.
    $24,000 - $28,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $18,000
  • 2.03 ct, H/VVS2, Emerald cut GIA Graded Diamond. Appraised Value: $61,600
    Estimate
    $19,000 - $23,000

    2.03 ct, H/VVS2, Emerald cut GIA Graded Diamond. Apprai...

    Est.
    $19,000 - $23,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $15,000
  • 3.01 ct, G/VS1, Emerald cut GIA Graded Diamond. Appraised Value: $152,300
    Estimate
    $47,000 - $55,000

    3.01 ct, G/VS1, Emerald cut GIA Graded Diamond. Apprais...

    Est.
    $47,000 - $55,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $34,000
  • 1.57 ct, H/VS1, Pear cut GIA Graded Diamond. Appraised Value: $29,900
    Estimate
    $13,000 - $16,000

    1.57 ct, H/VS1, Pear cut GIA Graded Diamond. Appraised ...

    Est.
    $13,000 - $16,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $8,000
  • 3.01 ct, D/VVS1, Square Emerald cut GIA Graded Diamond. Appraised Value: $274,600
    Estimate
    $70,000 - $81,000

    3.01 ct, D/VVS1, Square Emerald cut GIA Graded Diamond....

    Est.
    $70,000 - $81,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $55,000
  • 5.01 ct, H/VS2, Emerald cut GIA Graded Diamond. Appraised Value: $394,500
    Estimate
    $110,000 - $127,000

    5.01 ct, H/VS2, Emerald cut GIA Graded Diamond. Apprais...

    Est.
    $110,000 - $127,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $80,000
  • 1.50 ct, H/VVS2, Round cut GIA Graded Diamond. Appraised Value: $35,500
    Estimate
    $12,000 - $15,000

    1.50 ct, H/VVS2, Round cut GIA Graded Diamond. Appraise...

    Est.
    $12,000 - $15,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $7,500
  • 2.01 ct, F/VS2, Radiant cut GIA Graded Diamond. Appraised Value: $70,000
    Estimate
    $20,000 - $23,000

    2.01 ct, F/VS2, Radiant cut GIA Graded Diamond. Apprais...

    Est.
    $20,000 - $23,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $15,000
  • 5.14 ct, Natural Fancy Yellow Even Color, VS2, Pear cut Diamond (GIA Graded), Appraised Value: $295,000
    Estimate
    $103,000 - $119,000

    5.14 ct, Natural Fancy Yellow Even Color, VS2, Pear cut...

    Est.
    $103,000 - $119,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $75,000
  • 6.01 ct, E/VS1, Emerald cut GIA Graded Diamond. Appraised Value: $841,400
    Estimate
    $341,000 - $390,000

    6.01 ct, E/VS1, Emerald cut GIA Graded Diamond. Apprais...

    Est.
    $341,000 - $390,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $250,000
  • 3.01 ct, F/VS1, Marquise cut GIA Graded Diamond. Appraised Value: $169,300
    Estimate
    $63,000 - $73,000

    3.01 ct, F/VS1, Marquise cut GIA Graded Diamond. Apprai...

    Est.
    $63,000 - $73,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $46,000
  • 2.02 ct, G/VVS2, Emerald cut GIA Graded Diamond. Appraised Value: $74,900
    Estimate
    $21,000 - $25,000

    2.02 ct, G/VVS2, Emerald cut GIA Graded Diamond. Apprai...

    Est.
    $21,000 - $25,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $16,000
  • 4.05 carat diamond pair, Oval cut Diamonds GIA Graded 1) 2.04 ct, Color D, VS1 2) 2.01 ct, Color E, VS1. Appraised Value: $168,600
    Estimate
    $68,000 - $78,000

    4.05 carat diamond pair, Oval cut Diamonds GIA Graded 1...

    Est.
    $68,000 - $78,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $50,000
  • 1.52 ct, H/VVS1, Pear cut GIA Graded Diamond. Appraised Value: $35,300
    Estimate
    $14,000 - $17,000

    1.52 ct, H/VVS1, Pear cut GIA Graded Diamond. Appraised...

    Est.
    $14,000 - $17,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $8,500
  • 3.01 ct, H/IF, Emerald cut GIA Graded Diamond. Appraised Value: $165,900
    Estimate
    $52,000 - $60,000

    3.01 ct, H/IF, Emerald cut GIA Graded Diamond. Appraise...

    Est.
    $52,000 - $60,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $38,000
  • 3.02 ct, D/VS1, Cushion cut GIA Graded Diamond. Appraised Value: $230,200
    Estimate
    $59,000 - $68,000

    3.02 ct, D/VS1, Cushion cut GIA Graded Diamond. Apprais...

    Est.
    $59,000 - $68,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $44,000
  • 2.01 ct, D/VS1, Heart cut GIA Graded Diamond. Appraised Value: $85,900
    Estimate
    $26,000 - $31,000

    2.01 ct, D/VS1, Heart cut GIA Graded Diamond. Appraised...

    Est.
    $26,000 - $31,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $19,000
  • 2.30 ct, E/VVS2, Oval cut GIA Graded Diamond. Appraised Value: $100,900
    Estimate
    $35,000 - $42,000

    2.30 ct, E/VVS2, Oval cut GIA Graded Diamond. Appraised...

    Est.
    $35,000 - $42,000
    Bid Global International Au...
    0 Bids
    Starting Bid
    $26,000

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.