Small DiaScope (S-305)

Mostly DiaScope is used for sorting Natural Loose diamonds of all small sizes relevant with appropriate size, colour (D to G) & clarity (IF to I3). Natural Loose Diamonds Small Size Is One Of The Vastly Selling Loose Diamonds Type In The World. However, Widely Used In The Small Jewellery And Even In The Watches. The Size Range From 0.005 Ct. Onwards Mostly. Although Fast Running Sizes Are From 0.01 To 0.03 Ct. Gemologist Believes That The Diamond Is The Heart Of An Extinct ‘Star ’. And Diamonds In Star Range (0.009 Carat To 0.021 Carat Per Piece) / Melee Range(0.021 Carat To 0.074 Carat Per Piece), As They Are Called , Are Mainly Used As Accent Stone In Diamond Jewellery And As Luxury Accessories For Pronounced Glamor And Value Addition. With the DiaScope high-quality diamond parcels are sorted for clarity and make in half the time as with the conventional tweezers method. The reliability is better. Also used fro small high-grade coloured gemstones in the same way. Now the small DiaScope is “One Microscope for all”


Diascope supply two basic type of different Illumination, which are reflected & transmitted type Illuminations. Reflected Double spot arm gooseneck, self-carrying, for variable oblique light illumination with distinct shadow effect. LED (Light Emitting Diode) segment- zoomable and height adjustable, for oblique and grazing light illumination with strong shadow. It creates half-shadow effects that lead to a good 3D impression without overly dark shadows. Transmitted type diffused daylight with sorting tray is especially designed to examine/sorting of Star and Melee type of diamonds on clarity bases.

Reflected Illumination

Double arm gooseneck (Reflected Type) – enhanced contrast of 3D shaped objects through distinct shadow effects.

Transmitted Illumination

Oblique (Transmitted Type) – Observe uncoloured transparent objects (Diamonds) in relief contrast.


Created for Diamond Application

From compact stands to flexible and stable boom stands, from basic transmitted light to polarisation contrast. Whether your object needs special illumination or simply the brightest light, you have various light guides to choose from. Position your specimen precisely by adding a gliding, tilting or rotating polarisation stage.

More than Design. All-in-One Device

It‘s compact and light weight. Yet Stemi 305 integrates everything you need into a single Greenough stereo microscope. Just plug it in and switch it on – that’s the installation done, with no extra accessory boxes or cables to clutter up your space. Then all you have to do is illuminate your object, focus and start snapping images (Optional).


Stemi 305

Stemi 305 is your compact stereo microscope with a 5:1 zoom. Stemi 305 lets you observe samples as they really are: three-dimensional and crisp in contrast – no preparation needed. Enjoy all the advantages of an easy-to-use microscope with integrated LED illumination for reflected and transmitted light. This Greenough microscope will give you crisp 3D impressions, versatile object illumination and easily acquired images to share, whenever you want.

Technical Specification

General Information

Operation concept Stereo microscope, Greenough design with 5:1 zoom range
Main Component Lens Body, Stand and Illumination
Lens Body Stemi 305 (binocular, incl. eyepieces 10×/23 Br. foc), Stemi 305 doc (phototube, incl. eyepieces 10×/23 Br. foc,)
Stands Ergonomic design with adjustable in height and inclination for longer use
Illumination Three Options are available, which are Dark-field, Bright field and oblique light Illumination
Input Power Supply 100 - 240 Volt AC, 60/50 Hz
Optical Data of the Basic and Optional System
Magnification range 8× to 40x with basic version (10× eyepieces, no front optics) all magnifications from 4× to 200× (interchangeable optics)
Maximum resolution 200 Lp/mm basic version; up to 400 Lp/mm with interchangeable optics
Maximum object field 29 mm basic version; up to 58 mm using interchangeable
Working distance 110 mm basic version; up to 185 mm using interchangeable optics
Body Light weighted aluminium body
Focusing Manual coarse adjustment with Tilting arm
Reflected Illumination Double arm gooseneck – enhanced contrast of 3D shaped objects through distinct shadow effects.
Transmitted Illumination Oblique – Observe uncolored transparent objects in relief contrast
Polarization Add-On Polarization filters for ringlights, spots and transmitted light units. Study birefringent objects, detect stress in Rough and Polished Diamonds