Moissanite vs. Diamond
About Moissanite
Moissanite, chemically known as silicon carbide, is famous for its appearance that closely resembles that of a real diamond. Its hardness, cut, and fire are extremely similar to those of a real diamond, making it impossible to distinguish between the two with the naked eye. It can even pass the diamond tester pen test and is currently the only gem that can substitute for a real diamond globally. Moissanite is highly accepted by consumers in many regions around the world. It can achieve the same wearing effect as a real diamond, but at a price that is less than one-tenth of that of a real diamond. It is both economical and cost-effective!
Moissanite vs. Diamond
Moissanite's fire, hardness, luster, refractive index, and physical properties are extremely similar to those of diamond. In fact, it even surpasses diamond in color and fire. The fire of moissanite is 2.4 times that of diamond. Moissanite has a higher dispersion and refractive index than diamond. With a hardness of 9.25, moissanite is second only to diamond and is harder than any other gemstone.
Unlocking the Sparkle: Understanding Moissanite's Carat, Color, Clarity, and Cut
Carat: Measuring the Weight of Moissanite
Carat is the unit of measurement for a moissanite's weight, with 1 carat equaling 0.2 grams. Visually, a higher carat weight generally corresponds to a larger diameter. As illustrated in the image, the size of moissanite increases noticeably from 0.2 carats (approximately 3.8mm in diameter) to 3.0 carats (approximately 9.4mm in diameter). The ideal carat weight depends on your personal preference, budget, and the occasion for wearing the jewelry. It's worth noting that moissanites with the same carat weight can appear slightly different in size due to variations in their cut proportions.
Color: Subtle Grading from Colorless to Light Yellow
The color grading of moissanite is similar to that of diamonds, although due to its inherent properties, moissanite may sometimes exhibit a slightly warmer tone compared to top-grade diamonds. As shown, moissanite color is meticulously divided into 11 grades, ranging from the "Colorless" D, E, and F grades to the "Light Yellow" Z grade. The most commonly available moissanite color grades fall within the D to K range. For those seeking the purest, icy-white appearance, D, E, and F grades are the ideal choice. The "Near Colorless" G to J grades typically appear colorless to the naked eye once mounted and offer excellent value. Moissanites graded K and below will exhibit a more noticeable pale yellow tint.
Clarity: Assessing the Internal Purity of Moissanite
Clarity refers to the absence of inclusions (internal flaws) and blemishes (external imperfections) in a moissanite. Moissanite clarity is graded on a scale with six main categories, from the highest grade FL (Flawless) to the lowest I1/I2/I3 (Included). SI (Slightly Included) and VVS (Very Very Slightly Included) grades are the most common in the market. FL and IF (Internally Flawless) moissanites are exceptionally rare. Generally, VVS-grade moissanite possesses very high clarity, with imperfections typically invisible to the unaided eye, making it a great balance of beauty and value.
Cut: The Key to Moissanite's Dazzling Brilliance
The cut is arguably the most crucial factor in determining a moissanite's brilliance (light reflected back to the eye), scintillation (sparkle), and luster (surface shine). For standard round moissanite, there are five cut grades: Carefully Selected Excellent, Excellent, Very Good, Good, Fair, and Poor. An exceptional cut maximizes the amount of light that is reflected and refracted, giving the moissanite its stunning fire. Therefore, it's vital to prioritize the cut grade when selecting a moissanite. Generally, "Excellent" and "Carefully Selected Excellent" cuts ensure that your moissanite will exhibit remarkable brilliance and sparkle.
How to Use a Diamond Tester to Check Diamond Authenticity
Understanding the Tester's Components:
Metal Probe Tip: This is the part that comes into contact with the gemstone. It senses the rate at which heat is conducted away.
Indicator Lights (e.g., "LAMP ON BATTERY OK," "DIAMOND," "SIMULANT"): These lights provide visual feedback on the device's status and the test result.
Sensitivity Adjustment Dial (VOLUME): This allows you to adjust the tester's sensitivity based on the size and temperature of the gemstone.
Power Switch (ON/OFF): Turns the device on and off.
Battery Compartment: Houses the batteries that power the device.
Ready Indicator Light (typically "LAMP ON BATTERY OK"): Illuminates when the tester is powered on and ready for use.
Heat Dissipation Plate (on the back): This area helps the tester maintain a stable temperature for accurate readings.
Contact Area for Finger (on the side or back): Placing your finger on this area completes the thermal circuit, allowing the tester to measure the gemstone's thermal conductivity.
Steps for Testing a Gemstone:
1.Power On the Tester: Turn on the diamond tester using the power switch.
2.Wait for the Ready Indicator: Allow the tester a short period to warm up. The "LAMP ON BATTERY OK" light (or a similar ready indicator) will illuminate when the device is ready for testing.
3.Adjust Sensitivity (if applicable): Based on the size of the gemstone, you might need to adjust the sensitivity using the "VOLUME" dial. Smaller stones generally require higher sensitivity. Refer to the tester's instructions for specific guidance.
4.Ensure Proper Contact:
Place the metal probe tip perpendicularly (at a 90-degree angle) onto the surface of the gemstone you want to test. Apply gentle, consistent pressure.
Simultaneously, make sure your finger is in contact with the designated sensor area on the tester. This completes the thermal circuit.
5.Observe the Indicator Lights: Watch the indicator lights for the test result:
"DIAMOND" Light Illuminates (and often an audible beep): This typically indicates that the gemstone is likely a diamond, as it is conducting heat within the expected range for diamonds.
"SIMULANT" Light Illuminates (or other indicators for non-diamonds): This suggests that the gemstone is likely a diamond simulant, such as cubic zirconia or glass, as it is not conducting heat in the same way as a diamond.
6.Retract the Probe: Once you have the result, carefully lift the probe tip from the gemstone.
7.Power Off the Tester: Turn off the diamond tester after use to conserve battery power.
Important Considerations:
Clean the Gemstone: Ensure the surface of the gemstone is clean and free of dirt or oils, as this can affect the accuracy of the reading.
Test Multiple Points: For larger stones, it's advisable to test at a few different points on the surface to get a more reliable reading.
Tester Limitations: These basic thermal conductivity testers are effective at distinguishing diamonds from common simulants like CZ and glass. However, they may not be able to differentiate diamonds from other materials with similar thermal properties, such as moissanite. More advanced testers that measure other properties are needed for that purpose.
Refer to Manufacturer's Instructions: Always consult the specific instructions that come with your diamond tester for the most accurate and detailed usage guidelines.
Not a Definitive Proof: While a diamond tester can be a helpful tool, it's not a 100% definitive proof of a diamond's authenticity. For absolute certainty, it's always best to consult with a qualified gemologist.
