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From 1.95 ct Rough to a 1.20 ct Multicolor Sapphire: A Custom City of Gem Cutting Journey

Some gemstones are straightforward to cut. Others require much more than simply choosing an oval, cushion, or round shape and following a standard cutting pattern. This natural unheated multicolor sapphire was one of those stones. The journey began with a 1.95 ct rough sapphire from Madagascar, sourced by City of Gem in its natural rough form. A customer from Germany purchased the stone as rough and requested a very specific custom cutting result. The challenge was not only to create a beautiful finished gemstone. The customer had two important requirements: the f

Gemstone

From Endana Rough to Opalescent Color-Shifting Sapphire: A Natural Unheated Journey to Norway

A 10.68 ct natural sapphire rough from Endana, Sri Lanka, was transformed into a 4.00 ct custom pear-shaped sapphire while preserving its natural rutile silk, opalescent character and lavender-blue to pink light-dependent color shift. At City of Gem, some of the most interesting gemstones are not necessarily the stones with the simplest color or the easiest cutting plan. They are stones that present several possible directions and require a decision about which natural characteristics should be preserved. This sapphire was exactly that kind of project. The journe

Gemstone

From Tanzania Tsavorite Rough to Finished Gemstones: A City of Gem Custom Cutting Journey

Tsavorite garnet is one of the most admired green gemstones in the world, valued for its vivid natural color, lively brilliance, and fine jewellery appeal. This City of Gem cutting journey began with a 65.50 ct parcel of natural unheated facet-grade Tsavorite rough from Tanzania, East Africa. The parcel contained 9 rough stones, each selected for its attractive green color, transparency, and cutting potential. Through careful planning, one rough stone was trimmed and separated into two pieces, allowing the final project to produce 10 finished gemstones. The rough ma

Gemstone, Rare Gemstones

A Living Moment Trapped in Sapphire for Millions of Years

Some gemstones are admired for color. Some are valued for clarity. Others become important because they preserve a rare natural story inside the crystal itself. This Ceylon Natural Blue Sapphire Crystal from Kataragama village around mining in Sri Lanka belongs to that special category. It is not only a blue sapphire crystal, but also a gemological specimen showing an eye-visible two-phase fluid inclusion with a moving gas bubble inside a natural cavity. The sapphire weighs 7.83 carats and measures 9.3 x 8.6 x 7.5 mm. Its body has a light blue to glassy blue appeara

Gemstone

From Ceylon Rough to Lavender Blue Cushion Spinel: A City of Gem Cutting Journey

Every gemstone journey begins differently. Some stones are selected from a parcel after careful technical study, while others connect with a person the moment they are seen. This natural unheated Ceylon spinel began as a 6.60 carat rough stone from Karawita village around mining in Sri Lanka. With its glassy body, soft lavender blue appearance, and strong transparency, it already carried the quiet charm that makes fine spinel so attractive to collectors and jewellery lovers. Before cutting, the rough was carefully checked under light. Near the surface, a very small

Gemstone

From Tanzania Rough to Finished Green Gemstones: A City of Gem Cutting Journey

Every finished gemstone carries a story from the earth, but some parcels tell that story more clearly than others. This natural green gemstone parcel began as six rough stones from Tanzania, East Africa, a region known in the gemstone world for producing attractive green gem materials with strong color, lively transparency, and excellent jewelry potential. Sourced by City of Gem and later cut and polished by Mr. Praveen, this parcel shows how careful planning can transform natural rough into bright, usable finished stones. The original rough parcel is estimated to h

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