SI2 Clarity

What SI2 Clarity Means for Buyers

SI2 is a point on the GIA clarity scale, which grades how many and how visible the internal inclusions and surface blemishes are at 10× magnification. The top of the scale is FL (flawless); the bottom is I3. The key word for buyers is 'eye-clean'. Whether you can see any inclusions without magnification. And that threshold is closer to the middle of the scale than most buyers assume.

Right now we're tracking 1,360,951 active SI2 clarity listings across our retailer network. The typical natural SI2 diamond trades around HK$16,807/ct while the lab-grown equivalent sits at HK$13,543/ct. Roughly a 19% gap that reflects the broader natural-vs-lab pricing gap, not a quality difference at this grade.

SI2 commands a modest 12.9% premium over the neighboring I1 grade. For buyers who prioritise face-up appearance over spec sheets, I1 delivers almost all of the visual quality for noticeably less. Pay for SI2 only if you care about the grade showing on the cert.

SI2 shows up most often in ROUND. About 678,838 listings at this moment. Followed by OVAL. Most of the supply clusters around the 0.5-0.99ct carat range, where demand is strongest and retailers keep the deepest inventory. If you're shopping an unusual shape or carat, expect thinner selection.

VS2 is typically eye-clean for almost any shape up to around 2 carats. SI1 is often eye-clean too, especially in brilliant-cut shapes like round and oval that hide inclusions well. But always check the plot or a high-resolution photo before buying SI-grade. Step-cut shapes (emerald, asscher) show inclusions more. Lean toward VS1 for those. Paying for VVS or FL is almost entirely about paper value, not what you'll see.