

















[Koshu precious stone Kiriko plusthree] Synthetic moissanite 8mm/1.502ct《Collaboration》 Loose with patch
Moissanite has a hardness of 9.5, second only to diamond, which has a hardness of 10, and has a higher dispersion rate than diamond, sphene, and demantoid garnet. In fact, it is a mineral suitable for gemstones. Since they are extremely rare to occur naturally, the ones that are commonly available are synthetic gemstones. This is also a synthetic moissanite. Moissanite comes in a variety of colors, so it's fun to collect it. Please enjoy this dazzling shine at hand.
This is a new Koshu precious stone Kiriko plus three type KARATS collaboration cut glass by Yoichi Fukasawa, the creator of Koshu precious stone Kiriko . This piece allows you to enjoy the fine and intricate reflections of the cut glass from any angle.
Moissanite has a high hardness of 9.5, making it a Koshu precious stone cut glass that is extremely time-consuming and difficult to polish, with the final polishing (the process of creating a gloss) taking a whole day for two pieces.
Click here for the interview article with Yoichi Fukasawa
・Type: Loose (natural stone)
・Stone name: Synthetic moissanite
・Weight: 1.502ct
・Scratch/chip: S
・Inclusion: -
・Accessories: Karatz quality guarantee card, case
▷For more information about moissanite
Is it true that it is difficult to tell the difference between moissanite and diamonds, even for professionals?
▷Jewelry processing available If you would like jewelry processing, please place an order along with your desired frame from the link below.
・[Choose from stones] Simple order
・[Choose from stones] Semi-order
*If you would like a photo of a stone placed in a frame, would like to discuss a full order, or have any other questions or concerns, please feel free to contact us here .
*Rough stones are not available. There are also some stones that cannot be used.
*We try to make sure that the colors in the photos are the same as the real thing, but the colors may look slightly different from the real thing depending on the lighting at the time of shooting and the monitor environment you are using. In addition, some photos may be taken using penlights.
*Click here for information on scratches, chips, treatments, and inclusions.
*For other frequently asked questions, please click here .
karatz_item_id: 12541143
This is a new Koshu precious stone Kiriko plus three type KARATS collaboration cut glass by Yoichi Fukasawa, the creator of Koshu precious stone Kiriko . This piece allows you to enjoy the fine and intricate reflections of the cut glass from any angle.
Moissanite has a high hardness of 9.5, making it a Koshu precious stone cut glass that is extremely time-consuming and difficult to polish, with the final polishing (the process of creating a gloss) taking a whole day for two pieces.
Click here for the interview article with Yoichi Fukasawa
・Type: Loose (natural stone)
・Stone name: Synthetic moissanite
・Weight: 1.502ct
・Scratch/chip: S
・Inclusion: -
・Accessories: Karatz quality guarantee card, case
▷For more information about moissanite
Is it true that it is difficult to tell the difference between moissanite and diamonds, even for professionals?
▷Jewelry processing available If you would like jewelry processing, please place an order along with your desired frame from the link below.
・[Choose from stones] Simple order
・[Choose from stones] Semi-order
*If you would like a photo of a stone placed in a frame, would like to discuss a full order, or have any other questions or concerns, please feel free to contact us here .
*Rough stones are not available. There are also some stones that cannot be used.
*We try to make sure that the colors in the photos are the same as the real thing, but the colors may look slightly different from the real thing depending on the lighting at the time of shooting and the monitor environment you are using. In addition, some photos may be taken using penlights.
*Click here for information on scratches, chips, treatments, and inclusions.
*For other frequently asked questions, please click here .
karatz_item_id: 12541143
Choose options




![[On sale May 23rd at 10 PM] "Limited 9 Stones - Shinjuku Pop-Up Celebration" All stones with Central Gem Laboratory sorting (3.0-3.5mm, VS-SI clarity) "Multiple purchase discount available"](http://store.karatz.jp/cdn/shop/files/collage_68f24c59-ad99-43b4-bb8f-f7560aa7f246.png?v=1792134404&width=2000)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/2026-10-1615.44.21.png?v=1792133085&width=1249)

![[10/22, 10:00 PM Sale] <limited to stones> Sky Blue Topaz (Round approx. 8mm, only one stone is approx. 10mm) <multiple purchase discount available></multiple></limited>](http://store.karatz.jp/cdn/shop/files/PA050720_0c803cec-809e-4351-8ed4-19b5405d1e2a.jpg?v=1791592314&width=4000)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/PA174389.png?v=1792208709&width=4000)
![[Available 10/12 at 10 PM] 《Limited to 1 stone》 FANCY LIGHT PINK 2.9mm/0.092ct FANCY Color Pink Diamond (Sorting report included) 《Multi-buy discount available》](http://store.karatz.jp/cdn/shop/files/PA174421_dc4a654d-29d9-43bf-a171-6be9a21db408.jpg?v=1792208298&width=3443)


![[Ref: 12564456] Mozambique Aquamarine 0.837ct Loose Stone](http://store.karatz.jp/cdn/shop/files/P9304778_1205a47a-754d-4e91-81eb-b5504df57807.jpg?v=1791985647&width=2889)
![[Item 12564407] Stibiotantalite from Afghanistan, 0.200ct loose stone](http://store.karatz.jp/cdn/shop/files/P9087102_156cecc1-8841-415e-947e-90507c14a237.jpg?v=1791932462&width=3296)
![[Item 12564406] Stibiotantalite from Afghanistan, 0.186ct loose stone](http://store.karatz.jp/cdn/shop/files/P9087172_7634593e-09c8-423c-a8d1-5fb037b38167.jpg?v=1791931980&width=3267)
![[Item No. 12564322] Burmese Red Spinel 0.176ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/P9090184_9700c589-2ea2-4930-80df-edac6c0e1e4b.jpg?v=1791931653&width=2569)
![[Item 12564569] Russian Non-Oiled Emerald 0.121ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/PA056832_d8692e6e-41d7-484a-8fb3-f15f7831d546.png?v=1791931343&width=2289)
![[Item 12564624] Tanzanian Cobalt Spinel 0.094ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/PA056278_9e257c06-11b3-4bdf-9629-db55fd3ecd95.jpg?v=1791930983&width=2918)
![[Item 12564627] Bekily Blue Garnet (Color-Change Garnet) from Madagascar, 0.620ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_66b45918-a745-4339-8b28-20879c90c42f.png?v=1791930312&width=2000)
![[Item 12564630] Black Sapphire 5.833ct Loose Stone](http://store.karatz.jp/cdn/shop/files/collage_5323eca5-42a7-4c5c-93bd-bc2b890eb781.png?v=1791928900&width=2000)
![[Item 12564325] Kenya Gold Sheen Sapphire (Star Sapphire) 0.477ct Loose Gemstone](http://store.karatz.jp/cdn/shop/files/P9098894_9e71d12f-afda-46cb-99c2-1c15650319a3.jpg?v=1791805575&width=3070)







![[Jeweler's tools] 4-piece set including loupe (10x magnification), tweezers, and 2 loose stones](http://store.karatz.jp/cdn/shop/files/P4130575.jpg?v=1776126091&width=4000)


![[Jeweler's Tools] Color change penlight loose set](http://store.karatz.jp/cdn/shop/files/P1010673_2976de1d-08ce-4d92-94af-524da4485c99.jpg?v=1725605083&width=4000)