























Brazilian Medusa Quartz (Paraiba Quartz) 0.614ct Loose Stone
Medusa quartz contains inclusions of the mineral gilalite within the crystal. While it is sometimes simply called gilalite-in-quartz, the GIA has designated the gemstone "Medusa Quartz" as the inclusions resemble a jellyfish called "Medusa Jellyfish." It also has several nicknames, including "Paraiba Quartz" because its beautiful blue color is reminiscent of Paraiba tourmaline and because it is mined in the state of Paraiba, Brazil, where Paraiba tourmaline is found. Enjoy the mysterious and beautiful world that unfolds within the stone.
Type: Loose (natural stone)
Stone name: Medusa quartz (Paraiba quartz)
・Weight: 0.614ct
・Size: 6.3 x 5.2 mm
・Shape: Oval cut
Scratches/chips: S
・Inclusions:- ·remarks:---
Accessories: Caratz quality guarantee, loose case (if not, a clear zippered case)
▷We accept jewelry processing orders
If you would like to have your item made into jewelry, please order it along with the frame of your choice using the link below.
・Simple order [Select by stone]
・[Select from stones] Semi-order
*If you would like an image photo of the stone in the 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 strive to make the colors in the photos as close to the actual product as possible, but they may look slightly different from the actual product depending on the lighting conditions during photography and the monitor settings you are using. Also, some photos may have been taken using a penlight.
*For information on scratches, chips, treatments, and inclusions, please click here .
*For other frequently asked questions, please click here .
karatz_item_id: 12558274
Type: Loose (natural stone)
Stone name: Medusa quartz (Paraiba quartz)
・Weight: 0.614ct
・Size: 6.3 x 5.2 mm
・Shape: Oval cut
Scratches/chips: S
・Inclusions:- ·remarks:---
Accessories: Caratz quality guarantee, loose case (if not, a clear zippered case)
▷We accept jewelry processing orders
If you would like to have your item made into jewelry, please order it along with the frame of your choice using the link below.
・Simple order [Select by stone]
・[Select from stones] Semi-order
*If you would like an image photo of the stone in the 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 strive to make the colors in the photos as close to the actual product as possible, but they may look slightly different from the actual product depending on the lighting conditions during photography and the monitor settings you are using. Also, some photos may have been taken using a penlight.
*For information on scratches, chips, treatments, and inclusions, please click here .
*For other frequently asked questions, please click here .
karatz_item_id: 12558274
Choose options
























Brazilian Medusa Quartz (Paraiba Quartz) 0.614ct Loose Stone
Sale price¥9,800
Regular price



![[6/ 10 PM JST Release] 《Limited to 11 Stones》Bicolor Gemstone Gacha featuring Paraiba Tourmaline and Euclase 《Bulk Purchase Discount Available》](http://store.karatz.jp/cdn/shop/files/2026-08-0914.21.02.png?v=1786252887&width=1343)


![[Use the #202509 Campaign] 2025 New Year's Lucky Bag 🎍 Gem Gacha Lucky Bag with 4 or more gemstones (worth ¥25,000) [Discount for bulk purchase of lucky bags]](http://store.karatz.jp/cdn/shop/files/gazou.png?v=1785994448&width=1254)

![[On Sale 10 PM, June 7] *Limited to 3 Sets* 1.0ct/D/VS-VVS/IDEAL Lab-Grown Diamond (Synthetic Diamond) & 2 Rare Cabochon Stones (Total of 3 Stones Included) *Multiple Purchase Discount Available*](http://store.karatz.jp/cdn/shop/files/collage_07f6900d-fa8d-4bc4-acda-dc4cf0e8fed7.png?v=1785923452&width=4000)
![[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_f4ce5d64-8804-46cd-8a67-6e5dfa2be8a9.png?v=1785924412&width=4000)
![[Sales start 10 PM, Aug. 10] Andesine-Labradorite Gacha with a Chance to Win a Dandelion Cut Worth 69,800 JPY (Limited to 12 Stones) (Plus 1 Andesine-Labradorite Stone) [Bulk Purchase Discount Available]](http://store.karatz.jp/cdn/shop/files/collage_9d631197-f87c-42dd-94c8-54df7bf67e47.png?v=1786088702&width=4000)
![[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_0f6126db-fe6e-4ec4-ab15-e86a0e08371b.png?v=1786253811&width=2000)




![【#202607 Akihabara Pop-up Store - Currently Removed for Display】[Colorfuri] Pt900 Black Opal 0.83ct / Diamond 0.62ct Ring with Certificate](http://store.karatz.jp/cdn/shop/files/P4085602_239fb724-e8c8-4f49-8fab-65e692522cdb.jpg?v=1785992300&width=4000)














![[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)