


















Brazil Medusa Dendritic Quartz 1.003ct Loose
Medusa Quartz with inclusions of the mineral gilalite inside the crystal. Although it is sometimes simply called Gilalite in Quartz, the GIA named it 'Medusa Quartz' because the inclusions resembled jellyfish, calling them "Medusa Jellyfish." This gemstone also has several other common names, such as 'Paraiba Quartz,' because its beautiful blue color is reminiscent of Paraiba Tourmaline, and it was found in Paraíba State, Brazil, a source of Paraiba Tourmaline. Please enjoy the mysterious and beautiful world spreading within the stone.
This is a rare type that includes Tinkerbell dendrites.
▶︎This is the loose stone we also featured in the "Gemologist Quiz" on X.
https://x.com/keiichiro_oyama/status/2074491691311214624?s=20
This is a rare stone that features dendritic patterns in Gilalite in Quartz (Medusa Quartz / Paraiba Quartz), and when light is shone upon it, the covellite glows pink, allowing you to also enjoy the characteristics of "Tinkerbell Quartz."
Normally, the blue gilalite appears like jellyfish, creating a mysterious look, but when light is shone upon it, the covellite glows pink, revealing an ethereal appearance. Furthermore, plant-like dendritic patterns can be observed, making this a highly collectible loose stone that combines three attractions: Medusa, Tinkerbell, and Dendritic.
・Type: Loose stone (natural stone)
・Stone Name: Medusa Quartz (Paraiba Quartz)
・Weight: 1.003ct
・Size: 5.7×5.7㎜
・Shape: Cabochon cut
・Scratches/Chips: S-A+
・Inclusions: -
・Remarks: ---
・Accessories: Karatz quality guarantee, loose stone case (if it doesn't fit, a zippered clear case)
▷Jewelry processing available
If you wish for jewelry processing, please order the desired setting along with it from the link below.
・【Choose from stones】Simple Order
・【Choose from stones】Semi-Order
※If you would like an image of the stone on a setting, want to consult about a full custom order, or have any other questions, please feel free to contact us here.
※Rough stones are not supported. Also, some stones may not be compatible.
※ We make every effort to ensure that the photos show the same color as the actual product, but due to lighting conditions during shooting and your monitor environment, the actual product may appear slightly different. Also, some photos may have been taken using a penlight.
※ For scratches/chips, treatments, and inclusions, please see here.
※ For other frequently asked questions, please see here.
karatz_item_id: 12561940
Choose options




![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/collage_1dd1e829-df9f-4e76-a142-640265f55415.png?v=1787212042&width=2000)

![[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)
![Limited to 10 stones: Madagascar pink sapphire (heart-shaped, including padparadscha color, approximately 3 x 2.3 mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_e3bc2b9c-c542-42ee-9a4d-e3f647d927ae.png?v=1787118079&width=2000)
![Limited to 10 stones: Madagascar pink sapphire (heart-shaped, including padparadscha color, approximately 3 x 2.3 mm) [Multiple purchase discounts available]](http://store.karatz.jp/cdn/shop/files/collage_9109ca4b-cf51-4ed2-9859-1a3f6b317f8b.png?v=1787121427&width=2000)


![[On sale at 10 PM on 7/X] "Limited 10 Stones" Pink Diamond Gacha "Multiple Purchase Discount Available"](http://store.karatz.jp/cdn/shop/files/2026-08-2017.07.21.png?v=1787213265&width=1281)


















![[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)
