An intriguing tale from Sri Lanka. Gemstones are full of surprises and the ones with accumulated luck and knowledge always find them.
(via Journal of Gemmology, Vol.28, No.1, Jan 2002) M D P L Francis and P G R Dharmaratne writes:
Abstract
An unusual gem deposit (man-made) lies in the remote village of Pallebedda in Sri Lanka. This deposit is known as ‘walankatu illama’ which lies within the bund or embankment of an abandoned tank called Kandiyapalle (alias Bisokotuwa). Second rate material from a jewelry industry of ancient times was included probably at the time of its construction. This deposit contains many archaeological artifacts including many varieties of beads, rough gems, gem carvings, glass and coins, but it is mined by villagers mainly for the precious stones because they cab be most easily marketed.
Introduction
Sri Lanka is renowned for its wide variety of fine quality gemstones such as sapphire, ruby, chrysoberyl, alexandrite, spinel and beryl. Most of these gems are found as alluvial deposits in ancient buried or existing stream beds and low-lying areas. There are several primary outcrop deposits but the gems found in them are commonly not of the best quality, other than those found at the moonstone deposit of Meetiyagoda.
Gem deposits in Sri Lanka are classified according to their distance of transportation from the source, by the shapes and sizes of the rock and mineral fragments found. Gem bearing beds where angular minerals and rocks have been deposited in situ are named as residual gem deposits. Gem bearing layers found on the hill slopes with minerals and rock fragments that are semi-rounded or rounded are termed eluvial gem deposits. The third type of gem deposit is alluvial, which is by far the most prevalent in Sri Lanka. These deposits generally lie in old stream beds, far away from their sources and are characterized by the presence of well rounded heavy minerals, indicating longer distances of transportation.
In Sri Lanka there is currently no scientific approach towards gem exploration. Established gem miners who can afford to invest in land, to purchase a license to prospect for gems and other expenses, always follow the trails of illicit gem miners. Some people find gems during their day-to-day activities such as construction of a well or while ploughing their farmlands. However, the type of gem deposit to be discussed in this paper is somewhat different to the three kinds of deposit outlined above.
Along the Ratnapura-Embilipitiya road, 21 km from Embilipitiya, is a village of Pallebedda, a gem trading center, which has existed since ancient times. Six km north east of Pallebedda is the small village of Galpaya, with an abandoned tank named Kandiyapalle alias Bisokotuwa Wewa. The bund (embankment) which encloses the tank contains hidden treasure consisting of a variety of gems, beads, and carvings made of different materials. These artifacts and gems occur in a layer in the bund, 60 to 180 cm thick, which local people call ‘walankatu illama’. In Sinhalese, ‘walankatu’ refers to pieces of earthenware and ‘illama’ refers to gem deposit. The artifacts beat witness to how knowledgeable the ancient civilization of Sri Lanka was and to their standard of living. The gem carvings exhibit the most intricate and delicate workmanship and provide evidence of a sophisticated technology of the time.
Historical records
According to several authors there is evidence that this area was once a flourishing agricultural village. R L Brohier, Surveyor General during colonial times, describes this tank with reference to a Mr Collins and a Mr Mitford who was Assistant Government Agent, Sabaragamuva Province in 1848. According to the quotes this tank was quite beautiful at the time and had watered nearly a thousand acres of paddy fields. There is an ancient stone pillar situated in the village with an inscription dating to the tenth century A.D which indicates that the village was called Girimandula. It is not certain as to who built the tank but according to folklore the builder was King Vijayabahu I (1055-1110).
Materials found
For the villager, ‘walankatu illama’ is merelya gem deposit, unique because artifacts were found among the buried potsherds. This deposit is located along the tank bund that extends for more than 3.2 km (two miles). At a depth of 60 to 120 cm from the top surface lies the layer called the ‘walankatu illama’ with an abundance of potsherds. The thickness of the layer ranges from 60 to 180 cm. The layer is easily identified and the material is washed as usual in large wicker baskets to extract the gem material. A general idea as to the percentage of the earthenware material contained in the illama can be formed from the heaps of debris found in the vicinity of the washing sites. The miners are interested only in the gems, carvings and beads that fetch high prices. The highest prices are obtained for gems such sapphire, geuda, pushparaga (yellow sapphire), chrysoberyl, etc. Even among these gems there are instances of finding stones with drill holes to indicate that they were once discarded as valueless, owing to imperfections detected during the process of drilling. Other than these, various kinds of objects have been found within the area, and these include many kinds of beads, clay utensils, glass bangles, stone cameos, intaglios, coins and bones.
The illama contains many types of large and small beads in a variety of shapes. These include, glass, carnelian, agate, amethyst, terracotta, garnet, feldspar, rock crystal, chrysoberyl and zircon. These stones are called ‘mukkaru gal’ by the villagers, because most have drill holes which identify them as the raw material of a trade practiced for a living by a segment of society known as mukkaru. The most sought after beads (mukkaru gal) were the beads made of gem materials such as conrundum or amethyst.
At this site agate beads and clear glass beads have also been found in large quantities. According to archaeological dating, clear glass was made at a later date than colored glass. As in many other places, carnelian beads of many shapes and sizes found at this site are believed to be from India. Pieces of beads broken during production, unfinished beads and discarded second-rate material suggest that there had been jewelry workshops here during ancient times.
Terracotta beads of various shapes and sizes are very common, the majority being disc-shaped; the larger ones are embedded with a tiny copper wire to strengthen the bead—an example of the ingenuity of the ancient craftsmen.
Almost all the beads show clear evidence of how they were drilled. The abrasion marks indicate that they were drilled from both ends to meet in the middle, and commonly this resulted in a slight disorientation in the center.
The question arises as to how they drilled tiny holes through these very hard substances. Some are of the opinion that emery powder and iron drill bits were used. If this is the case, how were the hard materials like sapphires drilled? Even for other gem species, it could have taken a very long time using this method to drill a single bead. Large numbers of beads found in the area suggest that the drillers were experts. Is it possible that they could have used diamond drill bits exported from India for the purpose of drilling? According to Henry Parker the bow-driven drill was familiar to locals in Sri Lanka from the second century B C onwards. So it is a fair assumption that they used this type of drill along with diamond drill bits to drill with ease large quantities of beads and to cope with the harder gems such as sapphire. A number of stones of hard materials such as sapphire and spinel that contain multiple drill holes of the same gauge or different gauges have been found. This could have happened as a result of testing the gauges of drill bits on these stones.
The most interesting materials found in this deposit are not the beads or the clay utensils but the most intricately carved cameos and intaglios. These carvings are mostly in materials such as carnelian, rock crystal and colored glasses, and very rarely in other types of material—one such rare type is chrysoberyl. Some carvings depict a cow in a seated position and three cows carved are similar to an ancient painting of an Egyptian goddess. The human figures carved are of both males and females. The female figures are mainly of dancers and of semi-nude woman meant to be either a dancer or more probably a goddess adorned with masks. Male figures include a hunter with his weapon and a dead animal, a seated Buddha in meditation and a man dragging a child bound with ropes, scratched on rock crystal (wessantara jataka, a parable of Buddhism).
Conclusion
These materials are much older than the date of construction of the dam, and this layer found within the dam was the fill material for the bund excavated from the nearby ancient work sites, where the clay utensils, beads and other carvings were manufactured. According to many experts, the materials can be dated from the first to the twelfth century A D. Therefore the assumption is that at the time the mukkaru people lived and worked in this vicinity in large numbers. The artifacts are of very good craftsmanship although they were made using the most primitive methods and instruments. In terms of the intricacy of the carvings and the quality of the drill holes in the sapphire they are not inferior to today’s standards. They are also remarkable aesthetically.
This is an unusual gem deposit because it contains artifacts that had been once discarded by people who were only interested in gems of value (precious material). Sometimes a villager who has found a carved artifact of a precious stone may try to erase the carving by grinding it on a lap to make a faceted gem. This would find a more ready market than the carvings, which are considered as archaeological artifacts and cannot be sold on the open market.
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