Sri Lanka ruby

1/21/2022 17:41 Read 91 views

The origin of Sri Lankan rubies is mixed with various metamorphic rocks, and the Sri Lankan rubies on the market are actually a mixture of various parent rock products, which determines the rather variable character of Sri Lankan rubies.


Sri Lankan ruby Characteristics: quite variable Rutile inclusions: elongated.Color: pink to large red to deep red Texture: hard Transparency: transparent to translucent.

1,Introduction to Sri Lankan rubies

Introduction to Sri Lankan rubies


As one of the top five gemstones in the world, rubies enjoy a high level of popularity and popularity. The two main sources of rubies are Burma and Sri Lanka, of which the pigeon blood ruby from Burma is recognized as the highest color grade ruby in the world, while the Sri Lankan ruby is different from the Burmese one, but has its own characteristics.

The origin of Sri Lankan rubies is a mixture of various metamorphic rocks, and the Sri Lankan rubies on the market are actually a mixture of various parent rock products, which determines the rather variable character of Sri Lankan rubies. The color tones of Sri Lankan rubies are highly variable, spanning from pink to large red to deep red, with cherry red and aqua being the best. Both Sri Lankan and Burmese rubies contain rutile inclusions, but Sri Lankan rubies have elongated rutile inclusions, which are not quite the same as those of Burmese rubies. Sri Lankan rubies are rich in crystalline inclusions, such as garnet, olivine, calcite, pyrite, spinel, apatite and other minerals.

2,Genesis of Sri Lankan rubies

Genesis of Sri Lankan rubies


Sri Lankan rubies have a variety of genesis, which determines the rather variable characteristics of Sri Lankan rubies.

(1) The color tones of Sri Lankan rubies vary greatly, from light red to red, pink, brownish red or maroon to cherry red. High-grade products are brilliant red with slightly pink or yellow tones, often called cherry red or aqua. Sri Lankan rubies have distinct color bands, often showing hexagonal shapes.

(2) Bicrystals: Sri Lankan rubies are less common with bicrystals along the rhombus {1011} or the base {0001}, and usually develop in only one group, and the thickness of the bicrystals is thicker, sometimes clearly visible under the microscope.

(3) Long needle-like rutile: The rutile needles in Sri Lankan rubies are elongated and very different from those in Burmese rubies.

(4) Crystal inclusions: Zircon is mostly in the form of fine granular crystals, often accompanied by a disk-shaped cleavage. There are also mineral inclusions such as garnet, olivine, calcite, mica, magnetic pyrite, spinel, apatite, etc.

(5) Gas-liquid inclusions: Sri Lankan rubies are rich in liquid inclusions, but cavities and negative crystals are not as common as Myanmar smear rubies, and the healed cleavage forms fingerprint-like, comb-like, net-like and other exquisite characteristic patterns.

3,Distribution and output characteristics of Sri Lankan rubies

Distribution and output characteristics of Sri Lankan rubies


Sri Lanka, formerly known as Ceylon, is one of the most important and famous gemstone producing areas in the world. The Sabaragamuwa region of Sri Lanka is rich in rubies and sapphires.

Main distribution and output characteristics.

Alluvial deposits are widely distributed in the western plains, in the zone between the peak of the river Dam and the sea, from north of Kandy to the zone near Matale at the southern end of the island; in the valley of the Krani River, a few miles east of the capital Colombo; in the beds of the Menik River and its tributaries, which come from the central mountainous region of the island and flow toward the southeastern coast. sapphires and garnets are produced from gneisses, while rubies, spinels and many other gems are produced from gneiss-associated marble. As with most other gemstone production features, weathering and erosion caused gem minerals in the primary ore to separate from non-gem minerals as monolithic stones, which were enriched in alluvial deposits to become valuable mineable gem minerals, i.e., alluvium. The primary deposits, however, are very poor and have no mining value.

4,Difference in color between Sri Lankan rubies and Burmese rubies

Difference in color between Sri Lankan rubies and Burmese rubies


Sri Lankan sapphires are better known than rubies, and Sri Lankan rubies and sapphires are relatively lighter in hue than Burmese rubies and sapphires. Burmese rubies are predominantly pigeon blood red peachy rose red, while Sri Lankan rubies are predominantly red with purple tones.

Burmese sapphires are predominantly sky blue, while Sri Lankan sapphires are predominantly light blue and ink blue. In addition, Sri Lanka's gem-bearing conglomerates are known for their brilliant sapphires, which include a variety of colors other than brown and black, similar to Burmese sapphires, which have a wide range of colors.


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