[On Sale 3/8 at 10pm] American Neptunite 0.290ct Loose Stone with Certificate of Authenticity

Neptunite is a rare mineral named after Neptune, the Roman god of the sea, and was discovered in San Benito, California, along with blue benitoite. It once attracted attention for its symbiosis with benitoite, but now that production of benitoite is declining, neptunite from San Benito, USA, is also becoming rare.

This is Neptunite that just arrived from Tucson, USA.
Neptunite is extremely difficult to polish due to its cleavage and tendency to break, and not many are sold as loose stones. This is a high-quality neptunite with excellent transparency and crystal condition, making it perfect for enjoying as a loose stone. It comes with a certificate of authenticity from an AGL-affiliated appraisal agency.

Type: Loose (natural stone)
Stone name: Neptunite
・Weight: 0.290ct
・Size: 5.1 x 3.7 mm
Shape: Pear shape
Scratches/chips: S-A+
Inclusions: None Accessories: Certificate of Authenticity (JTL (Jewel Trading Laboratory)), loose stone case (if it does not fit, a clear zippered case will be provided)

▷We accept jewelry processing.If you would like to have your jewelry processed, please order along with the frame of your choice from 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 .


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