https://danushkagemsmining.com/

Danushka Gems & Minings, Ratnapura Road, Rakwana (2026)

14/10/2026

A 10.10 ct natural Ceylon steel blue spinel rough from Ratnapura village around mining in Sri Lanka, with a naturally rounded alluvial form and a very clean internal appearance.

The rough measures 14.6 × 9.5 × 6.3 mm and has a particularly useful shape for cutting because much of the natural outline can potentially be followed rather than removed unnecessarily. This gives the cutter a good starting point for balancing symmetry, face-up size, and weight retention.

The body appearance is predominantly steel blue, while different light sources reveal a subtle shift toward violet and slightly pinkish tones. This type of visual behavior is best observed by comparing the stone under different lighting rather than judging it from a single photograph.

With its clean structure, useful depth, and favorable alluvial outline, this is an interesting piece for professional faceting. As always, exact finished weight and shape depend on orientation and preforming.

14/10/2026

This video shows a 10.10 ct natural unheated steel blue spinel rough from Ratnapura.

In normal viewing, the stone presents a cool steel-blue body appearance. As the light source changes, subtle violet and slightly pinkish tones can become visible, showing the stone's gentle color-shift behavior.

The rough is also very clean and naturally rounded from alluvial movement, giving it a favorable starting shape for cutting. When rotated under strong light, the cutter can evaluate transparency, internal cleanliness, depth, and the direction that may offer the best balance between face-up beauty and weight retention.

Because the natural form is already relatively efficient, the stone has good practical potential for a strong finished yield, although the exact result can only be confirmed after preforming.

13/10/2026

Some treasures are not found behind glass.
They are hidden between mountains, beneath rivers, along quiet village roads, and in places where nature still sets the rhythm of everyday life.
This is Rakwana, Sri Lanka — where a gemstone journey can become much more than searching for stones.
You follow the water, cross the hills, meet the people, and somewhere along the way, flashes of blue, violet, pink, and other colors appear in your hand.
But the stone is only one part of the treasure.
The forests, the rivers, the wildlife, the mountain air, and the unexpected moments along the road become part of its story.
This is how we experience gemstones at Danushka Gems & Minings — not simply as something we buy and sell, but as pieces of a much bigger journey through Sri Lanka.
Sometimes you go looking for a gemstone… and discover much more than a gemstone.

13/10/2026

A 4.00 ct natural unheated Ceylon blue sapphire rough from Kahawatta village around mining in Sri Lanka, with a naturally rounded alluvial shape and proportions that appear well suited to a cushion-style cutting plan.

The rough measures 9.4 × 8.3 × 4.7 mm and shows an attractive blue body appearance with facet-grade potential. Its broad face and softened outline could allow a cutter to follow the natural form rather than remove unnecessary material simply to force a different shape.

As with any rough sapphire, the final result depends on orientation, internal features, depth, color distribution, and the balance between symmetry and weight retention. No exact finished weight or clarity should be assumed before preforming.

For a customer looking for a natural unheated Ceylon sapphire with a practical cushion direction, this is an interesting piece to evaluate.

13/10/2026

This 4.00 ct unheated blue sapphire rough from Kahawatta shows a naturally rounded alluvial form that immediately suggests a cushion-style cutting direction.

When the stone is moved under light, the blue body appearance and available transparency can be examined from different angles. The broad outline is useful because the cutter may be able to preserve more of the natural width while developing a cushion shape instead of heavily trimming the rough into another form.

The main cutting decisions would be orientation, pavilion depth, symmetry, and how much weight can realistically be retained while keeping good face-up color and an attractive finished outline.

It is a good example of how the natural shape of the rough can guide the cutting plan.

$When weight priority comes first, every fraction of a carat matters. 💙This natural unheated Ceylon blue sapphire began a...$

12/10/2026

When weight priority comes first, every fraction of a carat matters. 💙

This natural unheated Ceylon blue sapphire began as a 1.67 ct alluvial rough, directly sourced by Danushka Gems & Minings from Kalawana village around mining in Sri Lanka.

The Australian customer's requirement was challenging: the finished sapphire had to remain above 1.00 ct. Because the rough was elongated with narrower ends, forcing perfect standard symmetry could have sacrificed the required weight.

After careful examination, planning and expert cutting by Mr. Hettiarachchi, the result was a 1.05 ct oval sapphire measuring 6.4 × 3.9 × 3.6 mm, with a modified step-cut pavilion and brilliant-style finishing facets.

Final cutting recovery: approximately 62.9%.

A journey balancing nature, weight, color, clarity, proportions and the customer's final purpose.

Read the full article to follow the complete journey from the mountain roads of Kalawana to cutting, certification and preparation for Australia.

12/10/2026

A 9.88 ct natural Ceylon blue sapphire rough from Endana village around mining in Sri Lanka, showing the rounded surface character typical of alluvial material.

This stone is currently unheated and is locally classified in the Sri Lankan trade as young geuda. In its present state, the material shows a pastel to medium blue appearance and can be evaluated for faceting while preserving its natural untreated status.

The second option is professional heat-treatment evaluation. Traditionally, geuda and young-geuda sapphires have been important materials in the Sri Lankan sapphire trade because selected stones may respond to controlled heating through changes in color, transparency, or internal appearance. However, heating is never a guaranteed process. Every stone responds differently depending on its chemistry, inclusions, zoning, structure and heating conditions.

For some buyers, keeping the stone natural and unheated is the priority. For others, treatment potential and possible color enhancement may be commercially more important. Both paths are valid, and the final decision should depend on the customer's intended market, jewelry use and preference.

12/10/2026

This video shows a 9.88 ct unheated young-geuda Ceylon sapphire rough from Endana village around mining in Sri Lanka.

Under different lighting and transmitted-light directions, the stone shows its natural pastel to medium blue body appearance, alluvial rounded form and internal structure. These observations are important before deciding how to orient the rough for cutting.

The stone can be approached in two different ways. It may be cut in its present natural, unheated condition, preserving the original appearance and treatment status. Alternatively, because it shows young-geuda characteristics, it may be evaluated for professional heat treatment before cutting or final finishing.

Heat treatment can sometimes modify color and transparency in suitable sapphire material, but the outcome cannot be predicted with certainty. The correct choice depends on the individual stone and the customer's priority.

08/10/2026

This is a 45.42 ct natural Ceylon rough gemstone collection consisting of eight facet-grade stones sourced from Elahera village around mining in Sri Lanka.

Seven pieces are natural rhodolite garnets with no treatment. Their colors range through pinkish-purple, magenta, w**e red and raspberry pink. An interesting characteristic of this material is how strongly the appearance changes with lighting and thickness. In the hand, some pieces can look deep grape or w**e colored, while strong transmitted light reveals much brighter pink, raspberry and magenta areas.

The eighth stone is a 10.48 ct zircon, now showing a pale yellow appearance. This particular zircon was originally darker and was subjected to a traditional Sri Lankan heating technique using a blowing pipe and coconut-shell fire.

Unlike modern laboratory furnaces, this traditional method relies heavily on the experience of the heater. The stone is exposed to carefully controlled heat generated from burning coconut shell or charcoal while air is directed through a blowpipe to intensify and manage the flame. Temperature, heating duration, airflow, cooling and the natural chemistry of each zircon can all influence the result.

For this stone, the treatment produced the present pale-yellow appearance. However, traditional heating does not guarantee the same result for every zircon, and no future color stability or identical outcome should be assumed for another stone.

The rhodolites remain untreated, while the zircon should correctly be disclosed as heat-treated.

This collection is intended for professional cutters, gemstone dealers, collectors and jewelers who appreciate natural Ceylon rough together with the traditional knowledge surrounding Sri Lanka’s gemstone trade.

#родолит #гранат #циркон #ロードライトガーネット #ガーネット原石 #イエロージルコン

08/10/2026

A closer look at this 45.42 ct Elahera rough gemstone collection reveals two very different characters.

The seven untreated rhodolite garnets can appear deep grape, w**e red or dark pink when viewed in the hand, but as strong light passes through the material, much brighter raspberry pink, magenta and pinkish-purple areas become visible. This change in appearance is especially useful when evaluating orientation before cutting.

Alongside them is a 10.48 ct pale-yellow zircon with a completely different story. The zircon was originally darker and was traditionally heated using a blowing pipe and coconut-shell fire, an old source-area method where heat, airflow and experience are used rather than a modern programmable furnace.

The resulting pale-yellow body can be seen clearly under transmitted light. Each stone should still be examined independently for internal structure, color distribution, orientation and realistic cutting yield before any final cutting decision.

Danushka Gems & Minings

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