Natural freshwater cultured pearls are cultivated in lakes and rivers of the species Hyriopsis cumingii in Asia and Amblema in North America and Northern Europe. In these species, a single shell can produce several pearls at once, sometimes even more than 20, being harvested after 2 - 6 years. The cultivation of freshwater pearls has been attested since the 13th century, with China currently being the world leader in production.
Stone type: Natural Smoky Quartz, Shape: Round, Color: Dark brown, Weight carat: 4.40, Treatment: Heated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 11.90, Sale information: Price by piece
Stone type: Natural Topaz, Shape: Cushion, Color: White, Weight carat: 5.45, Treatment: Untreated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 8.90x7.00, 8.80x6.90, Sale information: Lot price, Lot details: Pair for earrings
Product name: Natural Zircon, Shape: Oval, Color: Brown, Stone size: 8.00x5.90 mm, Weight: 2.15 carats, Stone clarity: No visible inclusions, Treatment: Untreated, Origin: Sri Lanka
Stone type: Natural Topaz, Shape: Marquise, Color: White, Weight carat: 9.10, Treatment: Untreated, Source: Brazil, Stone Clarity: Eye clean, Stone size mm: 16.00x8.00, Sale information: Lot price, Lot details: Pair for earrings
Stone type: Natural Topaz, Shape: Emerald, Color: White Brown, Weight carat: 4.35, Treatment: Untreated, Source: Pakistan, Stone Clarity: Slightly visible inclusions, Stone size mm: 10.51x7.47, Sale information: Price by piece
Product name: Natural Tourmaline, Shape: Oval, Color: Brown, Stone size: 5.90x5.40 mm, Weight: 0.90 carats, Stone clarity: No visible inclusions, Treatment: Untreated, Origin: Sri Lanka