【11/2 22時販売開始】《限定8石》コロンビア産マンゴークォーツ（最大60ct含む,平均21.6ct）《複数購入割引有》
Sale price¥1,980
![[On sale November 1st at 10 PM] [Limited to 12 stones] Brazilian Indigolite Tourmaline Gacha Loose Stone (4x3mm, Oval Cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/PA230072.jpg?v=1761804822&width=4000)
![[On sale 10/31 at 10 PM] Limited to 10 stones: 0.20ct Yellow Diamond Loose Stone, Including Fancy Colors [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_64543983-1aef-497a-b59d-22c8da336a98.png?v=1761804115&width=2250)
![[On sale from 10/25 at 10 PM] Limited to 12 stones: Mexican Opal (Custom Faceted Cut) Loose Stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_563486d0-bfec-49f4-9cb5-32fe12701045.png?v=1761350349&width=2250)
![[On sale from 10/25 at 10 PM] Limited to 11 stones: Sakura-shaped Contralus Opal and a specially cut Opal Gacha with one loose stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/2025-10-258.06.34.png?v=1761347238&width=1250)
Sri Lankan star sapphire 1.323ct loose
Sale price¥3,980
Sri Lankan star sapphire 1.061ct loose
Sale price¥3,980
Prehnite 5.3mm/0.469ct loose
Sale price¥3,980
Prehnite 5.6mm/0.565ct loose
Sale price¥3,980
Orange zircon 0.453ct loose
Sale price¥3,980
Zircon 0.414ct loose
Sale price¥3,980
Goethite in Amethyst 0.806ct loose stone
Sale price¥4,980
Blue tourmaline from Afghanistan 0.209ct loose
Sale price¥2,980
Blue tourmaline from Afghanistan 3.5mm/0.178ct loose
Sale price¥3,980
Yellow tourmaline 0.431ct loose stone
Sale price¥3,980
Color change sapphire 0.283ct loose
Sale price¥3,980
Rutilated Quartz (Rutilated Quartz) 6.402ct Loose
Sale price¥3,980
Color change sapphire 0.401ct loose
Sale price¥3,980
Green quartz 10.330ct loose (pineapple cut)
Sale price¥4,980
Andalusite 5mm/0.480ct loose
Sale price¥3,980
![[On sale from 10/22 at 10 PM] Limited to 14 stones: Lab-grown diamond (cabochon cut, approximately 2.3mm) - 1 loose diamond [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_69e68b54-0eb4-42e4-9bf1-bd9f3830d208.png?v=1760920748&width=2250)
![[On sale 10/22 at 10 PM] Limited to 10 stones: London Blue Diamond Gacha Loose Stone (including 3.6mm, VS-SI grade equivalent, treated) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/PA170328.jpg?v=1760920536&width=4000)
![[On sale from 10/18 at 10 PM] Limited to 10 stones: Greenland Ruby (2mm, with certificate from the mine owner) - Single loose stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010072_03ace85f-7297-4784-b894-a29098f147f9.jpg?v=1760749472&width=4000)
![[On Sale 10/19 at 10 PM] [Limited to 10 stones] Spinel Gacha Loose Stone, Including 1.17ct Bicolor Spinel [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/PA170079.jpg?v=1760746140&width=4000)
![[Sales start on Friday, October 31st at 10:00 PM] New anime "Hell Teacher Nube" x KARATZ collaboration original random acrylic keychains](http://store.karatz.jp/cdn/shop/files/FIX_-11.jpg?v=1760861228&width=4500)
![[Sales start at 10:00 PM on Friday, October 31st] New anime "Hell Teacher Nube" x KARATZ collaboration original acrylic stand](http://store.karatz.jp/cdn/shop/files/1_4c6c968c-6db5-458f-a891-e73749c1a17a.jpg?v=1760422214&width=4500)
![[Sales start on Friday, October 31st at 10:00 PM] New anime "Hell Teacher Nube" x KARATZ collaboration original glitter tin badges](http://store.karatz.jp/cdn/shop/files/1_24a31620-bd03-4006-98d1-6ef840402ca0.jpg?v=1760421857&width=4500)
![[Sales start on Friday, October 31st at 10:00 PM] New anime "Hell Teacher Nube" x KARATZ collaboration original clear postcard set](http://store.karatz.jp/cdn/shop/files/428aad1349d1b6062359ea69c02bc6d8_6a1b25e9-611b-4c68-9588-eedff19a7429.jpg?v=1760420792&width=4500)
![[Sales start on Friday, October 31st at 10:00 PM] New anime "Hell Teacher Nube" x KARATZ collaboration original sticker set](http://store.karatz.jp/cdn/shop/files/16d74c3394e651e16b3426ed000fc68d.jpg?v=1760420285&width=4500)
![[On Sale 10/12 at 10 PM] [Limited to 15 stones] One loose, unheated silky pink sapphire from Vietnam (2.5mm, round cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010261_a395415b-ed3a-4054-93e9-3ef1eec4d810.jpg?v=1757670251&width=4000)
![[On Sale at 10 PM on October 12th] Limited to 14 stones: One loose hot pink sapphire from Mozambique (pear-shaped, approximately 4 x 3 mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010380_b8f4e8df-e135-458b-8f10-fc4f411d34e2.jpg?v=1760236878&width=4000)
![[4 stones left] Brazilian Dendritic Quartz Kitten Cut Loose Stone (For Beginners) (5mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_bee5ee11-c26d-47e0-9e94-2c270bbdf768.png?v=1760169992&width=2250)
![[Available at 10:00 PM on October 12th] Limited Quantity: Myanmar Gray Spinel/Platinum Spinel (2.0mm, Round Cut) Loose Stone [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/collage_231273fd-13cc-4e42-8137-21a4a7b68f97.png?v=1743813632&width=4000)
![[On Sale 10/5 at 10 PM] [Limited to 11 Stones] Synthetic Moissanite Gacha 💎 Koshu Kiriko Plus Three Moissanite, Sange Cut, Pink, and Blue Moissanite, Loose Stones Included [Multiple Purchase Discounts Available]](http://store.karatz.jp/cdn/shop/files/collage_651faf70-f61a-4363-8c57-36a5e217dbd0.png?v=1759535374&width=2250)
![[On sale from 10/5 at 10 PM] Limited to 9 stones: 1 loose Australian opal (faceted cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/15_dc816088-689d-48f9-a277-773d85ed082c.png?v=1759454434&width=1500)
![[On sale from 10/10 at 10 PM] [Limited to 10 stones] Brazilian Bicolor Tourmaline Loose Stone (Baguette Cut) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/14_15be1edf-3bee-4b6c-a802-65c04eb4d4a9.png?v=1759454008&width=1500)
![[On Sale 10/10 at 10 PM] [Limited to 8 stones] Mexican Hyalite Opal Loose Stone (Large 4ct, Fluorescent in sunlight) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_02d2c005-b0b0-4bdb-b567-6788a4b464ec.png?v=1759967028&width=2250)
![[Available at 10 PM on October 5th] Limited to 4 stones: Sri Lankan Rhodolite Garnet (4mm, Round Cut) - 1 loose stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/11_68a1bbaf-11da-453a-b687-bb5d166e5fdb.png?v=1759451951&width=4000)
UV type mint garnet 0.521ct loose
Sale price¥3,980
Bicolor tourmaline 0.418ct loose
Sale price¥3,980
Brazilian rainbow scapolite 6mm/0.516ct loose
Sale price¥2,980
Brazilian Medusa Quartz (Paraiba Quartz) 1.181ct loose
Sale price¥3,980
Australian boulder opal 0.874ct loose
Sale price¥3,980
Australian boulder opal 1.156ct loose
Sale price¥3,980
[10/10 22:00 Sale] Brazilian Petalite 0.725ct Loose Stone
Sale price¥4,980
[10/11 22:00] Tanzanian Spessartine Garnet 0.209ct Loose Stone
Sale price¥4,980
![[On sale from 10/4 at 10 PM] [Limited to 17 stones] Tanzanian Bicolor Sapphire Loose Stone [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010326.jpg?v=1759127192&width=4000)
![[On sale at 10 PM on September 29th] [Limited to 14 stones] Brazilian Dendritic Quartz Loose Stone (Average 7 carats) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/P1010182_dba92f7a-563c-4cb3-8248-3f75fd0cdc47.jpg?v=1759117806&width=4000)
Why not take your favorite gemstone that you found at KARATZ and have it made into custom-made jewelry? It will be made by skilled Japanese craftsmen.
We carefully craft each piece of jewelry, starting with the stone setting, to match the individual characteristics of the gemstone.
So that more people can feel closer to jewellery and enjoy it easily.
We will introduce KARATZ's thoughts on products, the attention to detail and efforts in selecting gemstones and creating jewelry.
KARATZ's Initiatives and Social Contributions
We will introduce KARATZ's efforts, including nurturing the next generation and business collaboration to develop the industry, and supporting children in Sri Lanka, the land of jewels.
KARATZ Books
These are books that KARATZ has been involved in writing, supervising, and planning. They are all books that allow you to enjoy gemstones from various angles. You can also purchase them directly.
jeweler's tools
For those who want to enjoy jewelry more but don't know what tools to use, we will introduce tools that are also used by KARATZ staff. You can also purchase them directly.