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Difference between Heated and Unheated Gemstones

Difference between Heated and Unheated Gemstones

With growing popularity of gemstones these days, some low-quality ones are also being sold in the market with the help of treatment and enhancements. They are treated with various methods that include Bleaching, Dyeing, Radiation, Heating, and Filling to enhance their colour, appearance, and durability. One of the most common methods amongst them is heating.

Heating is a treatment that has been used for centuries! If we dig deep into its history, the early man happened to be the first practitioners of the art of heat treatment. Since then it is being used in a more sophisticated manner for treating gemstones.

The gemstones are subjected to a very high temperature between 500 and 1800 degrees Celsius which changes their colour altogether. It improves both, clarity and colour. All this depends upon other factors such as the rate of heating and pressure as well.  The best example is Sapphire. In the market, very nearly 90% of the Sapphires are heat treated! That is why the heat treated sapphire value is less. If some amount of titanium is being added to the furnace during heating, then a white color sapphire can be converted into a beautiful looking Blue Sapphire (Neelam). From the astrological point of view, the original stone is a white sapphire which represents planet Venus (Shukra) but after heating it has become blue sapphire, which is actually meant for the planet Saturn/ Sani. So, the wearer who wants to reap benefits from the planet Saturn/ Sani in his horoscope won’t get the desired results. In fact, this treated sapphire may give adverse effects to the wearer. So, one should avoid wearing heated gemstones.

But the big question here is how to differentiate between heated gemstones and unheated gemstones? Below you’ll find a table that showcases the basic difference between the two to make a careful decision while buying gemstones online.


Heated Gemstones

Unheated Gemstones





Less authentic

More Authentic





No inclusions or they are formed after heating

Has natural inclusions

Healing properties of Gemstones

After undergoing the heating process, gemstones loses its healing properties

The healing and astrological properties are intact

Why opt for Unheated, Natural Gemstones?

No doubt about the fact that many heated gemstones are being sold in the market but the impact that it has on the wearer also matters. For someone who is planning to wear a gemstone for healing or astrological purpose, then natural gemstones are the best choice. They provide all the benefits of the respective planet and are naturally occurring which makes them seem more genuine and reliable.

Once you have decided to buy a gemstone here are two important things to keep in mind.

  • Rarity is an important factor that determines the value of a gemstone. If gemstones are easily available in the market, then it doesn’t hold much value. It is scarcity that drives people to buy a gemstone due to being uncommon and unique. They might be expensive but are available in the market.
    Also, get a certificate from a reputed gemological laboratory when buying natural, untreated gemstones. It has all the information about the gemstone and its treatment.

Gemkart is a leading gemstones brand that has the largest collection of certified and unheated gemstones all under one site. For more information, please visit: www.gemkart.com


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  • Ruby real reqd unheated untreated unprocessed wt 20+ ct with inclusions will do please quote price
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  • Over the years of independence, the institute has trained more than 13000 physicians (including 800 clinical interns, 1116 masters, 200 postgraduates and 20 doctoral students) in various directions.

    870 staff work at the institute at present,] including 525 professorial-teaching staff in 55 departments, 34 of them are Doctors of science and 132 candidates of science. 4 staff members of the professorial-teaching staff of the institute are Honoured Workers of Science of the Republic of Uzbekistan, 3 – are members of New-York and 2 – members of Russian Academy of Pedagogical Science.

    The institute has been training medical staff on the following faculties and directions: Therapeutic, Pediatric, Dentistry, Professional Education, Preventive Medicine, Pharmacy, High Nursing Affair and Physicians’ Advanced Training. At present] 3110 students have been studying at the institute (1331 at the Therapeutic faculty, 1009 at the Pediatric, 358 at the Dentistry, 175 students at the Professional Education Direction, 49 at the faculty of Pharmacy, 71 at the Direction of Preventive Medicine, 117 ones study at the Direction of High Nursing Affair).

    Today graduates of the institute are trained in the following directions of master’s degree: obstetrics and gynecology, therapy (with its directions), otorhinolaryngology, cardiology, ophthalmology, infectious diseases (with its directions), dermatovenereology, neurology, general oncology, morphology, surgery (with its directions), instrumental and functional diagnostic methods (with its directions), neurosurgery, public health and public health services (with its directions), urology, narcology, traumatology and orthopedics, forensic medical examination, pediatrics (with its directions), pediatric surgery, pediatric anesthesiology and intensive care, children’s cardiology and rheumatology, pediatric neurology, neonatology, sports medicine.

    The clinic of the institute numbers 700 seats and equipped with modern diagnostic and treating instrumentations: MRT, MSCT, Scanning USI, Laparoscopic Center and others.

    There are all opportunities to carry out sophisticated educational process and research work at the institute.

    Medical Institute of CIS

    Medical Institute of CIS
    official website of the medical institute
    how much do you need to study at a medical institute
    how much do you need to study at a medical institute

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