Yellow Sapphire Kowangu Rough Price – Natural Kowangu Pushparaga

Discover the characteristics and value of Natural Yellow Sapphire Kowangu Rough, a traditional Sri Lankan trade category of yellow corundum associated with distinctive internal features and potential for gemstone treatment.

Also known as Kowangu Pushparaga, this material is of interest to gemstone traders, experienced heat treaters, lapidaries and collectors looking for unusual yellow sapphire rough from Sri Lanka.

Yellow Sapphire Kowangu Rough Characteristics

• Gemstone: Yellow Sapphire (Pushparaga)
• Mineral: Corundum
• Chemical Formula: Al₂O₃
• Crystal System: Trigonal
• Mohs Hardness: 9
• Colour: Yellow to golden yellow
• Internal Features: May contain rutile silk, cloudy areas or other inclusions
• Material: Natural sapphire rough
• Potential Uses: Gemstone cutting, heat-treatment evaluation and mineral collecting

What Determines Yellow Sapphire Kowangu Rough Price?

The value of Kowangu yellow sapphire rough depends on its individual characteristics, crystal condition and potential after cutting or treatment.

Important valuation factors include:

1. Natural Colour: Yellow hue, tone and saturation.
2. Internal Inclusions: Type, distribution and visibility of inclusions.
3. Transparency: Degree of transparency and cloudiness.
4. Crystal Weight: Individual weight and dimensions.
5. Crystal Condition: Natural shape, fractures and surface damage.
6. Faceting Potential: Estimated usable material and possible finished gemstone yield.
7. Heat-Treatment Potential: Suitability for controlled treatment based on the individual stone.
8. Treatment Status: Whether the rough is untreated or previously heated.
9. Origin and Documentation: Verified geographical origin and supporting reports.

Kowangu Pushparaga and Heat Treatment

Kowangu Pushparaga is a traditional Sri Lankan trade term associated with certain yellow corundum rough. It is included among the recognised local Geuda categories.

Experienced gemstone professionals may assess this material for controlled heat treatment, potentially aiming to improve colour or produce a more desirable yellow or yellow-orange appearance.

However, treatment results vary from stone to stone. Heating does not guarantee improved colour, clarity, transparency or market value.

Yellow Sapphire Kowangu Rough Price Per Carat

There is no universal fixed price per carat for Kowangu yellow sapphire rough. Individual values depend on colour, inclusions, transparency, fractures, crystal weight and potential cutting or treatment results.

Rough material selected for possible heat treatment should be evaluated separately from transparent, faceting-grade yellow sapphire. Any estimated future gemstone value should remain separate from the current rough valuation.

Buy Natural Yellow Sapphire Kowangu Rough

Looking for natural Kowangu Pushparaga rough for gemstone cutting, collecting or wholesale purchasing?

Contact us for available rough gemstone selections, actual photographs, videos, individual weights, dimensions and personalised quotations.

We welcome enquiries from international gemstone buyers, lapidaries, jewellery designers, collectors and gemstone traders interested in natural Sri Lankan sapphire rough.