Rs. 90,500 – Rs. 120,000 per ct.
Rs. 66,500 – Rs. 80,000 per ct.
Rs. 40,500 – Rs. 56,200 per ct.
Rs. 26,500 – Rs. 35,000 per ct.
Rs. 18,500 – Rs. 22,000 per ct.
Rs. 13,000 – Rs. 16,700 per ct.
Due to their exclusiveness, Ruby is the most exploited gem in the world. Not only Sapphires within the Corundum group, but also semi-precious gems like Almandine Garnet and Spinel are widely treated, recut and sold as “New Burma Mine” Rubies for less than Rs. 7,000 per carat. Please note, there is nothing called "New Burma Mine" in existence.
Since a flawless natural Ruby above a few carats is even rarer than diamonds, Ruby prices increases exponentially when moving from 3 to 4 carats. The legendary Burmese Pigeon Blood Ruby would cost above Rs, 225,000 per carat.
Over 85% of all Rubies mined are thermally treated at low temperatures to reduce mineral impurities and natural rutile inclusions. This is usually not considered as an enhancement. However, synthetic interventions like Cavity Filling by Glass, Flux Healing, Beryllium and Lead Diffusion is widely used that reduce the value of the gem by more than 95%.
Rs. 10,500 –Rs. 12,500 per ct.
Rs. 8,200 – Rs. 9,800 per ct.
Rs. 4,700 – Rs. 5,200 per ct.
Rs. 2,450 – Rs. 2,700 per ct.
Rs. 1,850 – Rs. 2,100 per ct.
Rs. 1,300 – Rs. 1,550 per ct.
Red Corals range from dark blood red to warm pink to orange-red. However, Mediterranean Ox Blood Red is the most desirable and is hence sold at a premium. Shape has no influence on the valuation of Red Corals, although triangular Red Corals are preferred for their astrological significance.
While Japanese Red Corals can command as much as 200% mark up over other varieties, in reality, ‘Japanese’ also include Red Corals from South Pacific Sea, while the ‘Italian’ variety also include those from the Atlantic region.
Of late, lacquer coated camel bones and multi-dyed wood (that resemble Red Coral texture) and even hard plastics are filling up the market. These are sold for less than Rs. 600 per carat and cannot be detected via Acetone or Hydrochloric Acid tests. The only way to identify Carotne, the popular coloring agent in Red Corals, is through Photoluminescence Spectroscopy.
Rs. 40,600 – Rs. 44,000 per ct.
Rs. 34,500 – Rs. 37,000 per ct.
Rs. 25,000 – Rs. 27,600 per ct.
Rs. 18,500 – Rs. 21,000 per ct.
Rs. 12,800 – Rs. 14,500 per ct.
Rs. 8,500 – Rs. 10,200 per ct.
Although Colombian Emeralds command a premium in the gemstone world, origin do not play a key role when it comes to astro-gemology. Almost every source country can produce gems of excellent color, luster and quality.
Being a Type III gemstone, all natural Emeralds will always have inclusions (feathers, needles or silk) called Jardins that play a role in identifying natural Emeralds. Rare eye clean Emeralds can easily command beyond Rs. 85,000 per carat. Emeralds are also routinely oiled to moisturize their internal brittle structure. This is fully accepted and does not devalue the gemstone.
Since Emeralds cannot be heated, Thailand has led the way in very innovative Beryl treatments to pass them as natural Emeralds. Undetectable even under a standard Chelsea Filter, these Polymer Raisins, Irradiation and Epoxy Fillings can only be identified by a Raman Spectrometer, which very few labs possess, and thus are able to declare.
Rs. 42,500 – Rs. 45,000 per ct.
Rs. 34,000 – Rs. 37,500 per ct.
Rs. 24,000 – Rs. 27,650 per ct.
Rs. 17,500 – Rs. 19,250 per ct.
Rs. 11,300 – Rs. 13,250 per ct.
Rs. 7,300 – Rs. 9,600 per ct.
The most sought after colors for Yellow Sapphire, Golden Canary Yellow and Light Butter Yellow, are typically from Sri Lanka. Pure natural Yellow Sapphires are always low to medium in saturation. If the tonal intensity is very high, then a fully untreated, natural Yellow Sapphire will typically cost Rs. 65,000 per carat and above.
Over 90% of all Yellow Sapphires mined are always subject to very minor thermal heating to a) increase depth; and b) hide and/or dissolve minor rutile inclusions. While these are acceptable for jewelry, heating destroys the astrological properties of the gem making it unsuitable as a potent remedy.
Low grade sapphires are often subject to Beryllium Treatment, Glass Filling and Lattice Injection to increase their brilliance. These sophisticated can only be identified by an expert gemologist using various advanced instruments (not just a microscope). Any artificial treatment makes a gemstone redundant for gem-therapy in astrology.
Rs. 47,500 – Rs. 50,000 per ct.
Rs. 37,000 – Rs. 41,500 per ct.
Rs. 27,000 – Rs. 30,550 per ct.
Rs. 19,500 – Rs. 22,000 per ct.
Rs. 13,500 – Rs. 16,550 per ct.
Rs. 8,050 – Rs. 10,250 per ct.
Totally colorless, without any secondary tint (orange, green or indigo) is the most desirable color of White Sapphire. These are the purest form of Sapphires because they lack any trace element that imparts color to Corundum; making them rare and precious.
Like the Yellow variant, White Sapphires are often heated to a) hide natural inclusions; and b) make them more appealing to look at. While acceptable as a jewellery, these are not suitable as an astro-remedy.
In a strange play of economics, higher demand for Yellow Sapphires has actually increased prices of untreated White Sapphires. Several manufacturers delve in the unscrupulous practice to artificially treat White Sapphires with heat, irradiation, dyes etc. to convert them into yellow variants. As a result, sourcing completely untreated, natural White Sapphires have become difficult, leading to higher prices.
Rs. 47,200 – Rs. 49,000 per ct.
Rs. 40,500 – Rs. 42,250 per ct.
Rs. 30,200 – Rs. 32,650 per ct.
Rs. 21,750 – Rs. 23,700 per ct.
Rs. 15,500 – Rs. 17,250 per ct.
Rs. 10,300 – Rs. 12,500 per ct.
Over 85% of all Blue Sapphires mined are always dull and unpleasant looking in raw form. Some heating below melting point is often done to make it acceptable and this is recognized by the trade. These heated gems are not ideal as astro-remedies. If the saturation is too vivid along with a high transparency, such natural untreated Blue Sapphires will either cost beyond Rs. 45,000 per carat or will have undergone some enhancing artificial treatment.
Since flawless Blue Sapphires are rare, Titanium Treatment, Lattice Diffusion, Lead Flux Polymers, Chromophore Radiation, etc. have become the norm for their enhancement that few gem labs disclose.
The desired colors for Blue Sapphire are Royal Blue (Indraneelam), Cornflower Blue, Pastel Blue and Cobalt Violet Blue (most common). Most natural and untreated Blue Sapphires are lighter in tone and has medium hue.
