These terms describe how much light passes through a gem.
Transparent: Light passes through the stone clearly and undistorted, allowing objects to be seen clearly through it. Examples: Fine diamond, sapphire, and emerald.
Semi-Transparent: Light passes through the stone, but it is diffused. Objects on the other side are seen as blurred shapes. Examples: Some sapphires, garnets, and topaz.
Opaque: No light passes through the stone. It is impenetrable to light. Examples: Lapis lazuli, turquoise, and malachite.
2. Common Clarity Grades (Based on the GIA Diamond Scale)
Included (I1, I2, I3): Obvious inclusions that are visible to the naked eye. They can affect transparency, durability, and brilliance.
Slightly Included (SI1, SI2): Inclusions are noticeable with medium effort using a 10x loupe and may be visible to the naked eye. SI1 inclusions are often harder to see without a loupe than SI2.
Very Slightly Included (VS1, VS2): Minor inclusions that are difficult to see with a 10x loupe. They are not visible to the naked eye. This is considered excellent clarity.
Very, Very Slightly Included (VVS1, VVS2): Minute inclusions that are extremely difficult to see under 10x magnification. They are invisible to the naked eye. This is a high grade of clarity.
3. Descriptive Clarity Terms
These terms describe how a stone appears to the viewer, not under magnification.
Eye Clean: A practical term meaning that no inclusions are visible to the naked eye (without magnification). A stone can be graded SI or VS and still be "eye clean," which is often an excellent value.
Loupe Clean: A term meaning no inclusions are visible under 10x magnification. This is very rare and indicates a stone of exceptional clarity. It is similar to a Flawless or Internally Flawless grade.
Learn About Gemstone Treatment Types
1. No Treatment (None)
The gemstone is in its natural state as found in the earth. It has not been subjected to any heat, radiation, or filling processes.
2. Heated (Thermal Treatment) - "Standard Heated"
The application of heat to improve color and/or clarity. This is a traditional, accepted practice for stones like sapphire, ruby, and tanzanite.
3. Beryllium Diffused / "Beryllium Heated"
A more advanced heating process where gems are heated with elements like beryllium to deeply infuse color into the stone. This can create vibrant oranges, pinks, and yellows, often in sapphires.
4. Minor Oil / Clarity Enhancement
A common practice for emeralds, where a colorless oil or resin is used to fill surface-reaching fractures, improving clarity and stability.
Why it matters:
Minor Oil/Faint: Indicates a small amount of residue. This is expected for most emeralds and requires only standard care.
Moderate to Significant Oil/Resin: The treatment is less stable. The filler can dry out, discolor, or be damaged by heat, ultrasound cleaners, or harsh chemicals. These stones require special care and may need re-treatment over time.
Product Description
Introducing an exquisite collection of 350 grams of stunning bi-color rough sapphires. Ranging in size from 3 to 6 carats, these hexagonally shaped gems boast a captivating blend of colors. With no treatments applied, their natural beauty shines through authentically
Features of Sapphire Bicolor Rough Minerals.
Stone: ______ Bi Color Sapphire Crystals
Total: ______ Weight: 350 grams
size: ______ 3 carat upto 6 carat
Shape: ______ Hexagonal
Colors: ______ Bicolor mix
Treatment: ______ No
Origin: ______ Tanzania
These are genuine bi-color rough sapphires ideal for crafting beads and pendants. They boast a natural hexagonal shape and have a combined weight of 100 grams, with sizes ranging from 3 to 6 carats each. What sets these sapphires apart is that they are completely unheated and untreated, maintaining their natural integrity. These crystals were discovered in Tanzania, and we have direct access to the mine, allowing us to make offers at a reasonable price. This direct access ensures that you're getting 100% authentic stones without any middlemen involved, making them a great value for your money. Whether you're a jewelry maker or a collector, these sapphires offer a unique opportunity to create something beautiful with ethically sourced gemstones.