Our mission at GMG Global Mark Gemstone is to responsibly source, process, and distribute raw gemstone materials, while upholding ethical standards and fostering sustainability throughout our operations. We strive to unearth the natural beauty of gemstones from their origins in the earth, ensuring that each stone is handled with care and respect for both the environment and the communities involved in their extraction.
1. Ethical Sourcing: We are committed to sourcing gemstones only from mines and suppliers that adhere to ethical labor practices, prioritize worker safety, and operate in compliance with international environmental regulations. We actively seek out partnerships with suppliers who share our values of transparency and social responsibility.
2. Sustainable Practices: We recognize our responsibility to minimize the environmental impact of our operations. Through sustainable mining practices, efficient use of resources, and continuous improvement initiatives, we strive to reduce our carbon footprint and preserve natural ecosystems for future generations
3. Quality Assurance: Our dedication to excellence extends to every facet of our business. We meticulously inspect and assess each gemstone to ensure its authenticity, quality, and integrity. By maintaining strict quality control measures, we uphold the trust and confidence of our customers in the products we offer
4.Community Engagement: We believe in giving back to the communities that support our industry. Through community development projects, education initiatives, and fair trade practices, we aim to empower local stakeholders and contribute to the socioeconomic development of regions where gemstone extraction occurs.
5.Innovation and Adaptability: In a rapidly evolving industry, we embrace innovation and adaptability as cornerstones of our success. We continuously invest in research and development to explore new technologies and methodologies that enhance efficiency, minimize waste, and unlock new opportunities for growth.
Color
Cut
Clarity
Carat
Color is difficult to define and classify. For centuries, colored gemstone dealers were forced to rely on descriptive terms that were not universally recognized or understood. For example, subjective terms for sapphires such as “cornflower blue,” “royal blue,” or “electric blue” were frequently used. Today, gemologists use a more universal and objective means of assessing the color of a gemstone. Color is now described collectively by three terms: hue, tone, and saturation.
The hue is the gemstone’s basic color. While a sapphire’s color might be described as yellow or blue, more often gems are a combination of hues. For example, an emerald can have yellow or blue secondary color components that affect its beauty and value. The hue of the emerald would be more accurately described as yellowish green or bluish green.
Saturation describes how pure or intense a color appears, and it is a key component in determining a gemstone’s value. A gemstone’s color may be diluted with what is called a “saturation modifier.” With cool-colored gems, such as blue, green, and violet stones, gray is the usual saturation modifier. With warm-colored gems, including yellow, red, and orange stones, the typical saturation modifier is brown.
A violet sapphire with poor saturation would be called grayish violet, while an orange sapphire with poor saturation would be called brownish orange. Regardless of the gemstone’s hue, higher levels of saturation are usually preferred, which means their color is not diluted by saturation modifiers. Some of the very finest gemstones have “vivid” saturation, but gems with “strong” saturation are also prized. A gemstone’s color may also depend on how it is cut. Skilled gemstone cutters fashion gems to maximize their brilliance
Most transparent gems reveal their full beauty only when they are cut. The term “cut” can have several meanings when applied to gemstones. For example, it may describe the faceting style or shape of a finished gemstone. It may also mean a gemstone’s proportion and finish. Proportion refers to the rough dimensions and overall symmetry of a gemstone. Finish describes the precision with which facets meet, the relative size and number of facets, and the quality of the stone’s polish.
1. They desire to present the gemstone’s best color and brilliance. In diamonds, a “near colorless” stone is desired. Many colored gemstones are pleochroic, which means their color changes depending on the angle at which they are viewed. Consumers usually prefer one color to another, so gemstones are cut so that the preferred color is visible through the crown of the stone.
2. They desire to maximize the gemstone’s final weight. This may be constrained by the gemstone’s crystal shape or growth-form.
3. They desire to minimize the appearance of undesirable inclusions.
4. They are required to fill consumer demand for certain fashions or cutting styles.
Gemstones are host to many different inclusions, and, with the important exception of diamonds, even the finest colored stones are not expected to be free of inclusions when viewed at 10x magnification. In fact, colored gemstones with no inclusions should be viewed with suspicion; they may be synthetic stones or glass imitations.
While diamonds are valued for their clarity, or lack of inclusions, the optimal clarity for most colored gemstones is “eye-clean,” which means no inclusions are visible to the naked eye. When evaluating clarity, experts consider the size, number, location, and overall visibility of the inclusions. The number of inclusions may also affect the gemstone’s durability.
1. Cavities are voids or holes that extend from the surface of the gemstone into its interior.
2. Color Zoning refers to areas or bands of alternating color in a gemstone.
3. Fingerprint Inclusions are networks of tiny liquid-filled tubes that resemble human fingerprints. Fingerprints are formed when gemstones recrystallize to partially heal a fracture zone.
4. Halo or Discoid Fractures are oval or circular fractures surrounding a solid or liquid inclusion. They resemble a fried egg. They may be formed from stress due to the radioactive decay of tiny zircon crystals or from the high temperatures required for heat treatment.
5. Included Crystals are light, dark, transparent or opaque minerals trapped inside a gemstone.
6. Liquid Inclusions are liquid-filled spaces within a gemstone.
Silk refers to the fine rutile needles that create the sleepy transparency in some rubies and sapphires. Silk is an example of an inclusion that may actually add value to a gemstone. In moderate amounts, the highly reflective rutile needles scatter light within a cut stone, helping to illuminate its darker facets and enhance its brilliance.
A gemstone’s size, if expressed in a unit of weight, is called a carat (abbreviated “ct”). A carat is a metric unit equivalent to one fifth (.20) of a gram. One hundredth of a carat is called a point (abbreviated “pt”). A number of small gemstones may be weighed together to give a total carat weight (abbreviated “tcw”).
The effect of carat weight upon gemstone value varies by gemstone type and color. For example, aquamarine is comparatively plentiful in sizes above five carats, but five-carat rubies are extremely hard to come by. In most gemstones, per-carat prices tend to increase with carat weight. In general, the consumer can expect steep increases in the price per carat at the one, three, five, and ten-carat levels.
High quality gemstones are not usually cut to calibrated sizes because it could result in a significant loss of weight. Commercial quality gemstones are more likely to conform to standard calibrated sizes.