"Carefully selected recommended diamond jewelry of 1 ct or more"

1ct is an eternal dream.
We have carefully selected diamond jewelry of 1 carat or more that combines elegance and splendor, making it a perfect piece to wear for a lifetime.

1ct UP diamond jewelry

<1CT UP Diamond Jewelry>

An elegant item woven with 1.6ct diamond and rare pink diamond.

Diamond: 1.602ct (M/SI2/Cushion Cut), 1.06ct, Pink Diamond: 0.137ct/Platinum 950, Platinum 850 (chain part)
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¥1,100,000
<1CT UP Diamond Jewelry>

In the center is a 2ct high quality oval cut diamond. Gorgeous and easy-to-use design

Diamond: 2.002ct (N/VS2/Oval Cut), Diamond: 0.95ct/Platinum 950
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¥1,500,000
<1CT UP Diamond Jewelry>

1.5ct marquise cut yellow diamond. Sharp design makes your neck look neat and gorgeous

Diamond: 1.507ct (Very Light Yellow/SI2/Marquise Brilliant Cut), Diamond: 0.80ct/Platinum 900, Platinum 850 (chain part)
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¥730,000
<1CT UP Diamond Jewelry>

In the center is a 1.5ct diamond. Vatican is a luxurious item using a 0.6 ct pear-shaped diamond.

Diamond: 1.519ct (Very Light Yellow/VS2/Oval Brilliant Cut), 0.655ct (L/SI2/Pear Brilliant Cut), 0.88ct/Platinum 950, Platinum 850 (chain part)
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¥942,000
<1CT UP Diamond Jewelry>

1.1ct colorless diamond. A simple design that allows you to enjoy the sharpness of a marquise cut without any decoration.

Marquise cut diamond: 1.131ct (D/SI2)/Platinum 900
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¥824,000
<1CT UP Diamond Jewelry>

Perfect as a gift for anniversaries, etc. A 1ct necklace with a simple design that can be worn all the time.

Diamond: 1.095ct (E/SI2/Very Good)/Platinum 900, Platinum 850 (chain part)
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¥465,000

1ct UP diamond loose

Although it is possible to purchase only the loose diamond, you can also order a customized single pendant necklace online using the diamond loose of your choice. We also accept semi-custom orders and custom-made items such as rings and necklaces, so please feel free to contact us.

custom made pendant necklace

How to order a custom-made pendant necklace

Choose diamond loose and order an original single diamond pendant necklace.
Get the one and only shine in the world.

< 1 >

Choose your preferred loose diamond from the list of loose diamonds (for custom-made pendant necklaces) and proceed to the product page.
*You can also purchase loose diamonds only (the green price is the price for the loose diamond only).

< 2 >

Please select your preferred design from the [Additional Options] at the bottom of the page.
*Prices vary depending on the carat of the loose diamond, the material, and the shape of the chain (Example: 6-prong solitaire design of 1ct or more from 46,000 yen, halo design of 1ct or more from 98,000 yen (chain included)).

<3>

The option to [Select chain type/adjustable length] will be displayed, so please select either Cut Azuki or Venetian.

<4>

The additional cost for creating a pendant necklace will be displayed. Please confirm the amount and click the "Add to Cart" button to proceed to checkout.

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