18K Gold Ring Settings

18K gold ring settings are semi-mounts in 18K gold. 18K means 18 parts gold out of 24, about 75% gold. The richer color comes from that higher gold share.

The center seat is open unless the listing says a center stone is included. Match the shape and the millimeters. 10K settings are on 10K gold ring settings.

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  • 18K Gold Semi Mount Ring Setting Oval Ov 7x5mm Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Oval Ov 7x5mm Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Oval Ov 7x5mm Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Oval Ov 7x5mm Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 7x5mmMetal: Sterling SilverSurface Finish: Rhodium PlatedHallmark: 925
    $2,576.07 USD
    $2,576.07 USD
  • 18K Gold Semi Mount Ring Setting Oval Ov Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Oval Ov Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Oval Ov Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Oval Ov Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsMetal: Sterling SilverSurface Finish: Rhodium PlatedHallmark: 925
    $2,939.88 USD
    $2,939.88 USD
  • 18K Gold Semi Mount Ring Setting Cushion Cu 9x9mm Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Cushion Cu 9x9mm Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Cushion Cu 9x9mm Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Cushion Cu 9x9mm Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 9x9mmMetal: Sterling SilverSurface Finish: Rhodium PlatedHallmark: 925
    $1,518.52 USD
    $1,518.52 USD
  • 10K 14K Gold or 18K Gold Semi Mount Ring Setting Princess Pr 17x17mm Diamond Accent Syzjewelry10K 14K Gold or 18K Gold Semi Mount Ring Setting Princess Pr 17x17mm Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Princess Pr 17x17mm Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Princess Pr 17x17mm Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 17x17mmMetal: 18K GoldHallmark: 18K
    $3,047.05 USD
    $3,047.05 USD
  • 18K Gold Semi Mount Ring Setting Princess Pr 13x18mm Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Princess Pr 13x18mm Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Princess Pr 18x18mm Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Princess Pr 18x18mm Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: As stated in titleSetting Size: 13x18mmMetal: 18K GoldHallmark: 18K
    $2,731.38 USD
    $2,731.38 USD

  • 18K Gold Semi Mount Ring Setting Emerald Em 7x5mm Sapphire Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Emerald Em 7x5mm Sapphire Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 7x5mmMetal: 18K GoldHallmark: 18K
    $491.72 USD
    $491.72 USD
  • 18K Gold Semi Mount Ring Setting Emerald Em 10x8mm Syzjewelry18K Gold Semi Mount Ring Setting Emerald Em 10x8mm Syzjewelry

    18K Gold Semi Mount Ring Setting Emerald Em 10x8mm

    This item is a 18K Gold Semi Mount Ring Setting Emerald Em 10x8mm. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 10x8mmMetal: 18K GoldHallmark: 18K
    $2,823.22 USD
    $2,823.22 USD
  • 18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 10x8mmMetal: 18K GoldHallmark: 18K
    $1,222.35 USD
    $1,222.35 USD
  • 18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 10x8mmMetal: 18K GoldHallmark: 18K
    $1,052.35 USD
    $1,052.35 USD
  • 18K Gold Semi Mount Ring Setting Cushion Cu 19x14mm Syzjewelry18K Gold Semi Mount Ring Setting Cushion Cu 19x14mm Syzjewelry

    18K Gold Semi Mount Ring Setting Cushion Cu 19x14mm

    This item is a 18K Gold Semi Mount Ring Setting Cushion Cu 19x14mm. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 19x14mmMetal: 18K GoldHallmark: 18K
    $3,650.01 USD
    $3,650.01 USD
  • 18K Gold Semi Mount Ring Setting Round Rd 4mm Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Round Rd 4mm Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Round Rd 4mm Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Round Rd 4mm Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 4mmMetal: 18K GoldHallmark: 18K
    $1,009.22 USD
    $1,009.22 USD
  • Art Deco 18K Gold Semi Mount Ring Setting Pear PE 14x10mm SyzjewelryArt Deco 18K Gold Semi Mount Ring Setting Pear PE 14x10mm Syzjewelry

    Art Deco 18K Gold Semi Mount Ring Setting Pear PE 14x10mm

    This item is a Art Deco 18K Gold Semi Mount Ring Setting Pear PE 14x10mm. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 14x10mmMetal: 18K GoldHallmark: 18K
    $2,234.63 USD
    $2,234.63 USD
  • Art Deco 18K Gold Semi Mount Ring Setting CU Cushion 12x10mm SyzjewelryArt Deco 18K Gold Semi Mount Ring Setting CU Cushion 12x10mm Syzjewelry

    Art Deco 18K Gold Semi Mount Ring Setting CU Cushion 12x10mm

    This item is a Art Deco 18K Gold Semi Mount Ring Setting CU Cushion 12x10mm. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 12x10mmMetal: 18K GoldHallmark: 18K
    $2,140.25 USD
    $2,140.25 USD
  • Men's 18K Gold Semi Mount Ring Setting Round RD 6x6mm Unisex Ring SyzjewelryMen's 18K Gold Semi Mount Ring Setting Round RD 6x6mm Unisex Ring Syzjewelry

    Men's 18K Gold Semi Mount Ring Setting Round RD 6x6mm Unisex Ring

    This item is a Men's 18K Gold Semi Mount Ring Setting Round RD 6x6mm Unisex Ring. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 6x6mmMetal: 18K GoldHallmark: 18K
    $1,419.06 USD
    $1,419.06 USD
  • 18K Gold Semi Mount Ring Setting Round Rd 4x4mm Art Deco Style Syzjewelry

    18K Gold Semi Mount Ring Setting Round Rd 4x4mm Art Deco Style

    This item is a 18K Gold Semi Mount Ring Setting Round Rd 4x4mm Art Deco Style. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 4x4mmMetal: 18K GoldHallmark: 18K
    $1,348.78 USD
    $1,348.78 USD
  • 18K Gold Semi Mount Ring Setting Cushion Cu 21x16mm with Diamond Accents18K Gold Semi Mount Ring Setting Cushion Cu 21x16mm with Diamond Accents

    18K Gold Semi Mount Ring Setting Cushion Cu 21x16mm with Diamond Accents

    This item is a 18K Gold Semi Mount Ring Setting Cushion Cu 21x16mm with Diamond Accents. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 21x16mmMetal: 18K GoldHallmark: 18K
    $3,973.23 USD
    $3,973.23 USD
  • 18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accents Syz Jewelry18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accents Syz Jewelry

    18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accents

    This item is a 18K Gold Semi Mount Ring Setting Cushion Cu 10x8mm with Diamond Accents. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 10x8mmMetal: 18K GoldHallmark: 18K
    $2,082.61 USD
    $2,082.61 USD
  • 18K Gold Semi Mount Ring Setting Oval OV 6x4mm Vintage Repro Syzjewelry18K Gold Semi Mount Ring Setting Oval OV 6x4mm Vintage Repro Syzjewelry

    18K Gold Semi Mount Ring Setting Oval OV 6x4mm Vintage Repro

    This item is a 18K Gold Semi Mount Ring Setting Oval OV 6x4mm Vintage Repro. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 6x4mmMetal: 18K GoldHallmark: 18K
    $1,166.96 USD
    $1,166.96 USD
  • 18K Gold Semi Mount Ring Setting Princess 5.5mm SQ 5x5mm Solitaire Syzjewelry18K Gold Semi Mount Ring Setting Princess 5.5mm SQ 5x5mm Solitaire Syzjewelry

    18K Gold Semi Mount Ring Setting Princess 5.5mm SQ 5x5mm Solitaire

    This item is a 18K Gold Semi Mount Ring Setting Princess 5.5mm SQ 5x5mm Solitaire. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 5.5mmMetal: 18K GoldHallmark: 18K
    $1,008.57 USD
    $1,008.57 USD
  • 18K Gold Semi Mount Ring Setting Pear PE 8x6mm D-PJC26676 Cabochon Diamond Accent Syzjewelry18K Gold Semi Mount Ring Setting Pear PE 8x6mm D-PJC26676 Cabochon Diamond Accent Syzjewelry

    18K Gold Semi Mount Ring Setting Pear PE 8x6mm D-PJC26676 Cabochon Diamond Accent

    This item is a 18K Gold Semi Mount Ring Setting Pear PE 8x6mm D-PJC26676 Cabochon Diamond Accent. Main gemstones are for illustration only, small stones are white topaz unless specified in description below. Setting Type: RingsSetting Size: 8x6mmMetal: 18K GoldHallmark: 18K
    $1,532.35 USD
    $1,532.35 USD

Tips from John

18K is about 75% gold. The richer color comes from that share. It is not a softness score, and it is not platinum.

StepDecideThen stop if
1The listing says 18K.It says another karat, or platinum.
2The center seat is what you will set.The listing already includes a center you do not want.
3Shape and millimeters match.There is no single size for every 18K setting.

About John: John is a Syzjewelry jeweler and business owner with 13 years of jewelry-design experience. This guide shares what sits in the other 250 parts of an 18K alloy and the questions to ask about it.

18K is 750 parts per thousand gold, and the other 250 parts decide the colour, the hardness, and who can wear the ring.

Common 18K recipes

  • Yellow: 75% gold, 12.5% silver, 12.5% copper.
  • Redder yellow: 75% gold, 15% copper, 10% silver.
  • Palladium white: about 75% gold, 10% palladium, 10.5% silver, 2.5% copper. Palladium runs between 7% and 15%.
  • Nickel white: 75% gold, 17% nickel, 6% zinc, 2% copper.

One label, three different metals

"18K white" can be a palladium alloy or a nickel alloy. Nickel white is cheaper and reads colder, and some customers react to it. Palladium white costs more, sits warmer, and holds its value as scrap.

Recycled metal

Too much recycled metal in the melt brings porosity into the casting.

Using this when you shop

  • Read the listing for the alloy. If it says only "18K white", ask which white.
  • If anyone you are buying for reacts to nickel, ask before you order.

Figures are ranges from my own bench notes. Actual practice follows each workshop's process card, order requirements and the current standard.

AlloyMix (parts per 100)What to know
Yellow75 gold, 12.5 silver, 12.5 copperThe standard yellow mix
Redder yellow75 gold, 15 copper, 10 silverMore copper gives a warmer colour
Palladium white75 gold, 10 palladium, 10.5 silver, 2.5 copperCosts more, warmer, holds scrap value
Nickel white75 gold, 17 nickel, 6 zinc, 2 copperCheaper and colder; some wearers react

Guide from Our Designer

18K is the gold share, about 75%. It is not a style. The style is still how the stone sits: open, framed, or rimmed.

Read the title, then the millimeters. 10K settings are on 10K gold ring settings.

BuildWhat you seeOn the listing
Open headThe center stone's face, with no frame.Solitaire, prong, or basket. Not the word halo or bezel.
HaloSmall stones around the center.Halo.
BezelA metal rim around the stone.Bezel.

FAQs

An 18K gold ring setting is a semi-mount in 18K gold, with the center seat open unless the listing says a center stone is included.

18K means 18 parts gold out of 24, about 75% gold. The color looks richer because the gold share is higher. That is the fact. This page does not call 18K too soft, too tough, or an heirloom.

The size that matches the listing. Read the shape and the millimeters. There is no single center size for every 18K setting.

They are different metals. This page is 18K gold settings. A platinum mounting is a product that says platinum. Shop the word on the listing, not a softness chart.

If no stock 18K setting matches the stone, Design Lab is the custom path. Finish, price, and timing are decided on that project, not in this guide.

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Other Tips

18K names the metal. The listing names the seat. Use both.

CheckUse thisDo not use this
Will the stone sit in the seat?Shape, plus length × width in millimeters, on the listing.Carat weight. The same carat can be cut to different millimeters.
Is the center included?The product page.The photo alone. A sample stone is often there for scale.
Are small stones part of the mounting?The accent line on that listing.Assuming every halo or picture includes them.