YELLOW SAPPHIRE ROUGH "KOWANGU" Price
Yellow Sapphire Rough Kowangu Price – Natural Kowangu Pushparaga
Discover the characteristics and value of Natural Yellow Sapphire Kowangu Rough, a traditional Sri Lankan gemstone-trade category associated with yellow corundum and potential heat treatment.
Known locally as Kowangu Pushparaga, this distinctive sapphire rough is of interest to gemstone traders, experienced heat treaters, lapidaries and collectors looking for natural yellow corundum.
Natural Yellow Sapphire Kowangu Characteristics
- Gemstone: Yellow Sapphire (Pushparaga)
- Trade Classification: Kowangu
- Mineral: Corundum
- Chemical Formula: Al₂O₃
- Crystal System: Trigonal
- Mohs Hardness: 9
- Colour: Yellow to golden yellow
- Material: Natural sapphire rough
- Potential Uses: Gemstone cutting, heat-treatment evaluation and mineral collecting
What Determines Yellow Sapphire Kowangu Rough Price?
The price of Kowangu yellow sapphire rough depends on the individual crystal’s quality, internal characteristics and potential after cutting or treatment.
Important valuation factors include:
- Natural Colour: Yellow hue, tone and saturation.
- Colour Distribution: Consistency and intensity of yellow colour.
- Internal Inclusions: Type, size and distribution of inclusions.
- Transparency: Degree of transparency and cloudiness.
- Crystal Weight: Individual weight and dimensions.
- Crystal Condition: Natural shape, fractures and surface damage.
- Faceting Potential: Estimated usable material and possible finished gemstone yield.
- Heat-Treatment Potential: Suitability for controlled heating based on internal characteristics.
- Treatment Status: Whether the rough is untreated or previously heated.
- 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 material within the local Geuda classification.
Selected material may be evaluated for controlled heat treatment to improve or develop yellow to orange-yellow colour. However, the response depends on the individual stone’s chemical composition, inclusions and treatment conditions.
Heating does not guarantee improved colour, clarity or market value. Professional assessment is important before treatment.
Yellow Sapphire Kowangu Rough Price Per Carat
There is no universal fixed price per carat for Kowangu yellow sapphire rough. Two crystals with similar weights can have different values because of variations in colour, transparency, inclusions, fractures and cutting potential.
Material intended for possible heat treatment should be evaluated separately from transparent faceting-grade yellow sapphire rough.
The estimated value of a future heated gemstone should not be confused with the current market value of untreated rough.
Buy Natural Yellow Sapphire Kowangu Rough
Looking for natural Kowangu Pushparaga rough for gemstone cutting, collecting or wholesale purchasing?
Contact us for available rough gemstones, actual photographs, videos, individual weights, dimensions and personalised quotations.
We welcome enquiries from international gemstone buyers, professional lapidaries, jewellery designers, collectors and gemstone traders interested in natural Sri Lankan sapphire rough.
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